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CEMİL TUNÇ (Prof. Dr.)
Full Address:
Department of Mathematics
Faculty of Sciences
Van Yuzuncu Yil University
65080, Van, Turkey
E-mail: [email protected]
Website: www.yyu.edu.tr
Education:
PhD, Institute of Science, Erciyes University,
(Dissertation Title: Some stability and boundedness results for two class of certain differential
equations of fourth order), 1993, Kayseri, TURKEY.
MS, Institute of Science, Erciyes University, (Masters Thesis Title: On the stability of solutions
of ordinary differential equations), 1990, Kayseri, TURKEY.
BS, Department of Mathematics, Faculty of Sciences
Atatürk University, 1982, Erzurum, TURKEY.
Experience:
Head of Department of Mathematics, 2007-Present
Dean of Faculty of Sciences, May 2011-August 2017.
Deputy Dean of Faculty of Sciences, September 2017-Present
Visiting Professor, University of Tennessee, Chattanooga, USA, June 2013-September 2013.
Visiting Professor, Jiaxing University, Jiaxing, PR China, December 2015-January 2016.
Research Interests:
Stability, instability, boundedness, asymptotic behaviors, oscillation, non-oscillation of
solutions, periodic solutions, almost periodic solutions, pseudo almost periodic solutions,
degree theory, fixed point theory, population dynamics, Lyapunov functions, Lyapunov
functionals, qualitative properties Ordinary Differential Equations, Functional Differential
Equations, Fractional Differential Equations, Partially Differential Equations, Integro-
Differential Equations, Functional Integro-Differential Equations, Integral Equations,
Functional Integral Equations.
Publications:
[284] Slinʹko, V. I., Tunç, C., Global asymptotic stability of nonlinear periodic impulsive
Equations. Autom. Remote Control, (2018), (accepted).
https://link.springer.com/journal/10513
[283] Biçer, E., Tunç, C., New theorems for Hyers-Ulam stability of Lienard equation with
varable time lags, Int. J. Math. Comput. Sci., 13 (2018), no. 2, 231–242.
http://ijmcs.future-in-tech.net/13.2/R-Tunc-Bicer.pdf
[282] Tunç, C., Tunç, O., New results on behaviors of functional Voltera integro-differential
equations with multiple time-lags. Jordan J. Math. Stat., (2018), (in press).
http://journals.yu.edu.jo/jjms/
[281] Khan, H., Tunç, C., Chen, W., Khan, A., Existence theorems and Hyers-Ulam stability
for a class of Hybrid fractional differential equations with p-Laplacian operator. J. Appl. Anal.
Comput. (2018), (in press).
http://jaac.ijournal.cn/
[280] Mahmoud, A.M.; Tunç, C., A new result on the stability of a stochastic differential
equation of third-order with a time-lag. J. Egyptian Math. Soc., (2018), (accepted).
[279] Tunç, C.; Mohammed, S.A., Uniformly boundedness in nonlinear Volterra integro-
differential equations with delay J. Appl. Nonlinear Dyn., (2018), (accepted).
https://lhscientificpublishing.com/Journals/JAND-Default.aspx
[278] Biçer, E., Tunç, C.; On the asymptotic btability behaviours of solutions of non-linear
differential equations with multiple variable advanced arguments. J. Appl. Nonlinear Dyn.,
(2018), (accepted).
https://lhscientificpublishing.com/Journals/JAND-Default.aspx
[277] Tunç, C., On the instability of nonlinear functional differential equations of fifth order.
Bol. Mat., 24(2), (2017), 155-168.
http://revistas.unal.edu.co/index.php/bolma
[276] Altun, Y., Tunç, C. , On the global stability of a neutral differential equation with variable
time-lags. Bull. Math. Anal. Appl. 9 (2017), no. 4, 31–41.
https://www.emis.de/journals/BMAA
[275] M. B. Zada, M. Sarwar, C. Tunç, Fixed point theorems in b-metric spaces and theirs
applications to non-linear fractional differential and integral equations. J. Fixed Point Theory
Appl. 20 (2018), no. 1, 20:25.
https://link.springer.com/journal/11784
[274] Tunç, C., Mohammed, S.A., On the stability and uniform stability of retarded integro-
differential equations. Alexandria Engineering Journal. (2018), (in press).
http://www.journals.elsevier.com/alexandria-engineering-journal/
[273] Tunç, C., Tunç, O., New results on the stability, integrability and boundedness in Volterra
integro-differential equations. Bull. Comput. Appl. Math. 6(1),(2018),41-58.
http://www.compama.co.usb.ve/
[272] Tunç, C., Tunç, O., On behaviors of functional Volterra integro-differential equations
with multiple time-lags. Journal of Taibah University for Science, (2018), (in press).
http://www.journals.elsevier.com/journal-of-taibah-university-for-science/
[271] Biçer, R., Tunç, C., On the Hyers -Ulam stability of Laguerre and Bessel equations by
Laplace transform method. Nonlinear Dyn. Syst. Theory. 17 (4) (2017), 340-346.
http://www.e-ndst.kiev.ua/
[270] Yazgan, R., Tunç, C., On the weighted pseudo almost periodic solutions of nonlinear
functional Duffing equation. Appl. Math. Inf. Sci. (AMIS). 11 (46), (2017),1609-1614.
http://naturalspublishing.com/show.asp
[269] Shoaib, M., Sarwar, M.; Tunç, C., Coupled fixed point theorem for multi-valued mapping
via generalized contraction in partially ordered metric spaces with applications. J. Math. Anal.
8 (2017), no.5, 27–39.
http://www.ilirias.com/jma/
[268] Tunç, C., Tunç, O., On the exponential study of solutions of Volterra integro-differential
equations with time lag. Electron. J. Math. Anal. Appl. 6 (2018), no. 1, 253–265.
http://fcag-egypt.com/Journals/EJMAA/
[267] Tunç, C., On the qualitative behaviors of a functional differential equation of second
order. Appl. Appl. Math. 12 (2017), no. 2, 813–2842.
http://www.pvamu.edu/aam
[266] Shah, K., Tunç, C., Existence theory and stability analysis to a system of boundary value
problem. Journal of Taibah University for Science. 11 (6), (2017), 1330-1342.
http://www.journals.elsevier.com/journal-of-taibah-university-for-science/
[265] Tunç, C., Ayhan , T., On the global existence and boundedness of solutions of a certain
integro vector differential equation of second order. J. Math. Fundam. Sci.,50 (2018), no. 1,
(2018), (in press).
http://journals.itb.ac.id/index.php/jmfs
[264] Tunç, C., Ayhan , T., Continuability and boundedness of solutions for a kind of
nonlinear delay integro-differential equations of third order. Nelīnīĭnī Koliv. 20 (2017), no. 3,
411-422.
https://www.imath.kiev.ua/~nosc/web/
[263] Tunç, C., Mohammed, S. A., A remark on the stability and boundedness criteria in
retarded Volterra integro-differential equations. J. Egyptian Math. Soc. 25 (2017), no. 4, 363–
368.
http://www.sciencedirect.com/science/journal/1110256X
[262] Gözen, M., and Tunç, C., A note on the exponential stability of linear systems with
variable retardations. Appl. Math. Inf. Sci. (AMIS). 11 (3), (2017), 899-906.
http://naturalspublishing.com/show.asp
[261] Tunç, C., Asymptotic stability and boundedness criteria for nonlinear retarded Volterra
integro-differential equations. Journal of King Saud University – Science, (2017), (in press).
https://www.journals.elsevier.com/journal-of-king-saud-university-science/
[260] Gözen, M., and Tunç, C., Stability in functional integro-differential equations of second
order with variable delay, J. Math. Fundam. Sci. 49 (1), (2017), 66-89.
http://journals.itb.ac.id/index.php/jmfs
[259] Tunç, C., Mohammed, S. A. , New results on exponential stability of nonlinear Volterra
integro-differential equations with constant time-lag, Proyecciones 36 (2017), no. 4, 615-639.
http://www.scielo.cl/scielo.php?script=sci_serial&pid=0716-0917
[258] Tunç, C., Mohammed, S. A., On the stability and instability of functional Volterra
integro-differential equations of first order. Bull. Math. Anal. Appl. 9 (2017), no.1, 151-160.
https://www.emis.de/journals/BMAA
[257] R. P. Agarwal, R. R. Mahmoud, S. H. Saker, C. Tunç, New generalizations of Németh-
Mohapatra type inequalities on time scales. Acta Math. Hungar. 152 (2017), no. 2, 383–403.
http://link.springer.com/journal/10474
[256] Tunç, C., Erdur, S., On the existence of periodic solutions to certain non-linear differential
equations of third order. Proceedings of the Pakistan Academy of Sciences: A. Physical and
Computational Sciences 54 (2): 207–218 (2017).
www.paspk.org/proceedings/
[255] Tunç, C., Altun, Y., On the nature of solutions of neutral differential equations with
periodic coefficients. Appl. Math. Inf. Sci. (AMIS). 11, (2017), no.2, 393-399.
http://naturalspublishing.com/show.asp
[254] Biçer, E., Tunç, C., On the Hyers-Ulam stability of certain partial differential equations
of second order. Nonlinear Dyn. Syst. Theory. 17 (2) (2017) 150–157.
http://www.e-ndst.kiev.ua/
[253] Yazgan, R., Tunç, C., Atan, Ö., On the global asymptotic stability of solutions to neutral
equations of first order. Palestine Journal of Mathematics. Vol. 6(2) (2017), 542–550
http://pjm.ppu.edu/
[252] Korkmaz, E., Tunç, C., Boundedness and square integrability of solutions of nonlinear
fourth-order differential equations with bounded delay. Electronic Journal of Differential
Equations, Vol. 2017 (2017), No. 47, pp. 1-13.
http://ejde.math.txstate.edu/
[251] Tunç, C., Tunç, O., A note on the stability and boundedness of solutions to non-linear
differential systems of second order. Journal of the Association of Arab Universities for Basic
and Applied Sciences, Vol. 24, (2017), 169-175.
http://ees.elsevier.com/jaaubas/
[250] Golmankhaneh, A.K., Tunc, C., On the Lipschitz condition in the fractal calculus. Chaos
Solitons Fractals 95 (2017), 140–147.
http://www.journals.elsevier.com/chaos-solitons-and-fractals/
[249] Tunç, C., On qualitative properties in Volterra integro-differential equations. AIP
Conference Proceedings 1798 (1), (2017), Article number 020164, 9pp.
http://scitation.aip.org/content/aip/proceeding/aipcp
[248] Tunç, C., Ayhan, T., Global existence and boundedness in a certain nonlinear integro-
differential equation of second order. Dyn. Contin. Discrete Impuls. Syst. Ser. A Math. Anal.
24 (2017), no. 1, 69–77.
http://www.watam.org/
[247] Tunç, C., On the qualitative behaviors of nonlinear functional differential systems of third
order. Advances in nonlinear analysis via the concept of measure of noncompactness, 421–
439, Springer, Singapore, 2017.
[246] Tunc, C., Dinç, Y., Qualitative properties of certain non-linear differential systems of
second order. Journal of Taibah University for Science 11 (2017), no.2, 359–366.
http://www.journals.elsevier.com/journal-of-taibah-university-for-science/
[245] Tunc, C., Qualitative properties in nonlinear Volterra integro-differential equations with
delay. Journal of Taibah University for Science 11 (2017), no.2, 309–314.
http://www.journals.elsevier.com/journal-of-taibah-university-for-science/
[244] Tunc, C., Gozen, M., On exponential stability of solutions of neutral differential systems
with multiple variable. Electron. J. Math. Anal. Appl. 5 (2017), no. 1, 17–31.
http://fcag-egypt.com/Journals/EJMAA/
[243] Korkmaz, E.; Tunc, C., Inequalities and exponential decay of certain differential
equations of first order in time varying delay. Dynam. Systems Appl. 26 (2017) 157-166.
http://www.dynamicpublishers.org/journals/index.php/DSA/author/submission/124
[242] Tunc, C., Stability and boundedness in Volterra-integro differential equations with
delays. Dynam. Systems Appl. 26 (2017) 121-130.
http://www.dynamicpublishers.org/journals/index.php/DSA/author/submission/124
[241] Tunç, C., Stability and boundedness in delay system of differential equations of third
order. Journal of the Association of Arab Universities for Basic and Applied Sciences. 22 (1),
(2017), 76-82.
http://www.journals.elsevier.com/journal-of-the-association-of-arab-universities-for-basic-
and-applied-sciences/
[240] Tunc, C., Stability and boundedness in differential systems of third order with variable
delay. Proyecciones 35 (2016), no. 3, 317–338.
http://www.scielo.cl/scielo.php?pid=0716-0917&script=sci_issues
[239] Tunç, C., Altun, Y., Asymptotic stability in neutral differential equations with multiple
delays. J. Math. Anal. 7 (2016), no. 5, 40–53
http://91.187.98.171/ilirias/jma/
[238] Tunç,C., On the existence of periodic solutions of functional differential equations of the
third order. Appl. Comput. Math. 15 (2016), no. 2, 189–199.
http://www.acmij.az/
[237] Tunc, C., Properties of solutions to Volterra integro-differential equations with delay.
Appl. Math. Inf. Sci. 10 (2016), no. 5, 1775-1780.
http://naturalspublishing.com/show.asp?JorID=1
[236] Ayhan, T., Tunc, C., On the global existence and boundedness of solutions of nonlinear
vector differential equations of third order. Appl. Appl. Math. 11 (2016), no. 1, 152–161.
http://www.pvamu.edu/aam
[235] Alam, Nur Md., Tunc, C., An analytical method for solving exact solutions of the
nonlinear Bogoyavlenskii equation and the nonlinear diffusive predator–prey system.
Alexandria Engineering Journal. 11 (2016), no. 1, 152–161
http://www.journals.elsevier.com/alexandria-engineering-journal/
[234] Tunc, C., Ates, M., Instability of certain nonlinear differential equations of fifth order.
J. Indones. Math. Soc.22 (1), (2016), 83-91.
http://www.jims-a.org/
[233] Graef, J. Tunc, C., Sevgin, S., Behaviors of solutions of nonlinear functional
Volterra integro-differential equations with multiple delays. Dynam. Systems Appl. 25
(2016), no. 1-2, 39–46.
http://www.dynamicpublishers.org/journals/index.php/DSA/author/submission/124
[232] Tunc, C., Ayhan, T., Global existence and boundedness of solutions of a certain
nonlinear integro differential equation of second order with multiple deviating arguments.
Journal of Inequalities and Applications, (2016), 1-7, 2016: 46 .
http://jiap.edmgr.com/
[231] Talib, I., Asif, N.A., Tunc, C., Coupled lower and upper solution approach for the
existence of solutions of nonlinear coupled system with nonlinear coupled boundary conditions.
Proyecciones. Journal of Mathematics 35 (2016), no. 1, 99–117.
http://www.scielo.cl/scielo.php?pid=0716-0917&script=sci_issues
[230] Talib, I., Asif, N.A.; Tunç, C., Existence of Solution for Second Order nonlinear
Coupled System with Nonlinear Coupled Boundary Conditions. Electronic Journal of
Differential Equations. Vol. 2015 (2015), no. 313, 1-11.
http://ejde.math.txstate.edu/
[229] Tunc, C., Instability in multi delay functional differential equations of fourth order. Fasc.
Math. 55 (2015), no. 2, 184-189.
http://www.math.put.poznan.pl/fasci_en.htm
[228] Tunc, C., Global stability and boundedness of solutions to differential equations of third
order with multiple delays. Dynam. Systems Appl. 24 (2015), 467-478.
http://www.dynamicpublishers.org/journals/index.php/DSA/author/submission/124
[227] Korkmaz, E.; Tunc, C., On some qualitative behaviors of certain differential equations
of fourth order with multiple retardations. J. Appl. Anal. Comput. 6 (2016), no.2, 336-349.
http://jaac-online.com/
[226] Tunc, C., New stability and boundedness results to Volterra integro-differential equations
with delay. J. Egyptian Math. Soc. 24 (2016), no. 2, 210–213.
http://www.sciencedirect.com/science/journal/1110256X
[225] Mahmoud, A.M.; Tunc, C., Stability and boundedness of solutions of a certain n-
dimensional nonlinear delay differential system of third-order. Adv. Pure Appl. Math. 7(1),
(2016), 1-11.
http://www.degruyter.com/view/j/apam
[224] Asif, N.A.; Talib, I.; Tunç, C., Existence of solution for first order coupled system with
nonlinear coupled boundary conditions. Bound. Value Probl. (2015) 2015:134, 1-9.
http://www.boundaryvalueproblems.com/
[223] Tunç, C., Pseudo almost periodic solutions for HCNNs with time-varying leakage delays.
Moroccan J. Pure and Appl. Anal. 1 (2015), no.1, 51-69.
http://www.springer.com/globalsciencejournals/mjpaa
[222] Tunç, C.; Ayhan, T., On the global existence and boundedness of solutions to a nonlinear
integro-differential equations of second order. J. Interpolat. Approx. Sci. Comput. (2015), no.1,
1-14.
http://ispacs.com/jiasc/
[221] Bicer, E., Tunç, C., On the existence of periodic solutions to non-linear neutral differential
equations of first order with multiple delays. Proc. Pakistan Acad. Sci. 52 (1), (2015), 79-84.
http://www.paspk.org/Proceedings.php
[220] Tunç, C., On the stability and boundedness of certain third order non-autonomous
differential equations of retarded type. Proyecciones. Journal of Mathematics 34 (2015), no. 2,
147-159.
http://www.scielo.cl/scielo.php?pid=0716-0917&script=sci_issues
[219] Tunç, C., Boundedness of solutions to certain system of differential equations with
multiple delays. Mathematical modeling and applications in nonlinear dynamics, 109–123,
Nonlinear Syst. Complex., Springer, Cham, 2016.
[218] Ergoren, H.; Tunç, C., A general boundary value problem for impulsive fractional
differential equations. Palest. J. Math. 5(2016), no. 1, 65–78.
http://pjm.ppu.edu/
[217] Tunç, C., Bicer, E., Hyers-Ulam-Rassias stability for a first order functional differential
equation. J. Math. Fundam. Sci. Vol. 47, No. 2, (2015), 143-153.
http://journal.itb.ac.id/index.php
[216] Tunç, C.,Tunç, O., On the boundedness and integration of non-oscillatory solutions of
certain linear differential equations of second order. Journal of Advanced Research. 7 (1),
(2016), 165-168.
http://www.journals.elsevier.com/journal-of-advanced-research/
[215] Tunç, C.; Liu, B., Global stability of pseudo almost periodic solutions for a Nicholson's
blowflies model with a harvesting term. Vietnam J. Math. 44 (2016), no. 3, 485–494.
http://link.springer.com/journal/10013
[214] Tunç, C., A note on the qualitative behaviors of non-linear Volterra integro-differential
equation. J. Egyptian Math. Soc. 24 (2016), no. 2, 187–192.
http://www.sciencedirect.com/science/journal/1110256X
[213] Tunç, C., Convergence of solutions of nonlinear neutral differential equations with
multiple delays. Bol. Soc. Mat. Mex.21 (2015), 219–231.
http://www.springer.com/birkhauser/mathematics/journal/40590
[212] Tunç, C., Instability to vector Liénard equation with multiple delays. Cubo A
Mathematical Journal 17(1), (2015), 1-9.
http://www.scielo.cl/scielo.php?script=sci_serial&pid=0719-0646&lng=en&nrm=iso
[211] Liu, B.; Tunç, C., Pseudo almost periodic solutions for CNNs with leakage delays and
complex deviating arguments. Neural Computing and Applications. 26 (2),(2015), 429-435.
http://www.springer.com/computer/ai/journal/521
[210] Liu, B.; Tunç, C., Pseudo almost periodic solutions for a class of nonlinear Duffing
system with a deviating argument. J. Appl. Math. Comput. 49 (2015), 233-242.
http://link.springer.com/journal/12190
[209] Graef, John R.; Tunç, C., Global asymptotic stability and boundedness of certain multi‐delay functional differential equations of third order. Math. Methods Appl. Sci. 38 (2015), no.
17, 3747–3752.
http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)1099-1476/issues
[208] Liu, B.; Tunç, C., Pseudo almost periodic solutions for a class of first order differential
iterative equations. Appl. Math. Lett. 40 (2015) 29–34.
http://www.sciencedirect.com/science/journal/08939659
[207] Korkmaz, E.; Tunç, C., Convergence of solutions to differential equations of fourth
order. Stability and boundedness to certain differential equations of fourth order with multiple
delays. Filomat 28:5 (2014), 1049–1058.
http://www.pmf.ni.ac.rs/pmf/publikacije/filomat/filomat_pocetna.php
[206] Tunç, C.; Tunç, O., A note on certain qualitative properties of a second order linear
differential system. Appl. Math. Inf. Sci. 9 (2015), No. 2, 953-956 .
http://naturalspublishing.com/show.asp?JorID=1
[205] Graef, John R.; Tunç, C., Continuability and boundedness of multi-delay functional
integro-differential equations of the second order. Rev. R. Acad. Cienc. Exactas Fís. Nat. Ser.
A Math. RACSAM 109 (2015), no. 1, 169–173.
http://www.springer.com/mathematics/journal/13398
[204] Tunç, C.; Mohammed, S.A., On the qualitative properties of differential equations of third
order with retarded argument. Proyecciones.33 (2014), no. 3, 325-347.
http://www.scielo.cl/scielo.php?pid=0716-0917&script=sci_issues
[203] Korkmaz, E.; Tunç, C., Convergence of solutions to differential equations of fourth
order. Nonlinear Dyn. Syst. Theory 14 (3) (2014) 312–321.
http://www.e-ndst.kiev.ua/v14n2.htm
[202] Tunç, C., Unstable Solutions to Nonlinear Vector Differential Equations of Sixth Order
with Delay. Appl. Appl. Math. 9 (2014), no. 1, 330–341.
http://www.pvamu.edu/aam
[201] Tunç, C.; Biçer, E., Stability to a kind of functional differential equations of second
order with multiple delays by fixed points. Abstr. Appl. Anal. Volume 2014, Article ID 413037,
9 pages.
http://www.hindawi.com/journals/aaa/
[200] Tunç, C., Instability of a fifth order non-linear vector delay differential equation with
multiple deviating arguments. U.P.B. Sci. Bull., Series A, Vol. 76, Iss. 1, 155-162, (2014).
http://www.scientificbulletin.upb.ro/SeriaA_-_Matematica_si_fizica_aplicate.php
[199] Tunç, C.; Ayhan, T., On the asymptotic behaviors of solutions to nonlinear differential
equations of second order. Comment. Math., (2015), (in press).
http://www.staff.amu.edu.pl/~commath/
[198] Tunç, C., On the stability to a functional Lienard type equation with variable delay by
fixed points theory. Appl. Math. Inf. Sci. (AMIS). 9, no. 1, (2015), 463-472.
http://naturalspublishing.com/show.asp?JorID=1
[197] Korkmaz, E.; Tunç, C., Convergence to non-autonomous differential equations of
second order. J. Egyptian Math. Soc. 23 (2015), no. 1, 27–30.
http://www.sciencedirect.com/science/journal/1110256X
[196] Tunç, C.; Gözen, M., Convergence of solutions to a certain vector differential equation
of third order. Abstr. Appl. Anal., Volume 2014, Article ID 424512, (2014), 6 pages.
http://www.hindawi.com/journals/aaa/
[195] Tunç, C., A note on the bounded solutions to ).()()(),,( tfxbtqxxtcx Appl. Math. Inf. Sci. (AMIS). 8(1), 2014, 393-399.
http://naturalspublishing.com/show.asp?JorID=1
[194] Tunç, C.; New results on the existence of periodic solutions for Rayleigh equation with
state-dependent delay. J. Math. Fund. Sci. Vol. 45, No. 2, (2013), 154-162.
http://journal.itb.ac.id/
[193] Tunç, C.; Yazgan, R., Existence of periodic solutions to multi-delay functional
differential equations of second order. Abstract and Applied Analysis. Volume 2013 (2013),
Article ID 968541, 5 pages.
http://www.hindawi.com/journals/aaa/
[192] Tunç, C.; Ergören, H., Boundedness of the solution set for a fourth-order nonlinear
differential equation with multiple deviating arguments. Acta Univ. M. Belii Ser. Math. Issue
2014, pp. 13-20.
http://actamath.savbb.sk/
[191] Tunç, C.; Ateş, M., Boundedness of solutions to differential equations of fourth order
with oscillatory restoring and forcing terms. Discrete Dyn. Nat. Soc. Volume 2013 (2013),
Article ID 758796, 5 pages.
http://www.hindawi.com/journals/ddns/
[190] Tunç, C., Unstable solutions to a class of vector differential equations of sixth order. Ann.
Differential Equations 30 (2014), no. 3, 253–257.
http://www.oriprobe.com/journals/caod_4318.html
[189] Tunç, C., Instability to differential equations of fifth and sixth order with variable
deviating arguments. Ann. Differential Equations 30 (2014), no. 4, 379–385.
http://www.oriprobe.com/journals/caod_4318.html
[188] Tunç, C., On the instability of solutions to a Liénard type equation with multiple deviating
arguments. Afr. Mat. 25 (2014), no. 4, 1013–1021.
http://link.springer.com/journal/13370
[187] Tunç, C., On the instability of a kind of vector functional differential equations of the
eighth order with multiple deviating arguments. Proyecciones. Journal of Mathematics. 32 (3),
(2013), 245-258
http://www.scielo.cl/scielo.php?pid=0716-0917&script=sci_issues
[186] Tunç, C., Instability to differential equations of fourth order with a variable deviating
argument. J. Math. Appl. 36 (2013), 113-119.
http://jma.prz.rzeszow.pl/jma/
[185] Tunç, C., Instability to nonlinear vector differential equations of fifth order with
constant delay. J. Math. Appl. 36 (2013), 123-130
http://jma.prz.rzeszow.pl/jma/
[184] Tunç, C., On the uniform asymptotic stability to certain first order neutral differential
equations. Cubo. A Mathematical Journal, Vol.16, No. 2, (2014), 111–119.
http://www.dmat.ufpe.br/CUBO/pg/download.html
[183] Tunç, C., and Gözen, M., Stability and uniform boundedness in multi delay functional
differential equations of third order. Abstract and Applied Analysis. Volume 2013, Article ID
248717, 7 pages, 2013. doi:10.1155/2013/248717.
http://www.hindawi.com/journals/aaa/
[182] Tunç, C., Stability and boundedness in multi delay Lienard equation. Filomat. 27 (3)
(2013), 437-447.
http://operator.pmf.ni.ac.rs/www/pmf/publikacije/filomat/filomat_pocetna.php
[181] Ergoren, H., Tunç, C., Anti-Periodic Solutions for a Class of Fourth-Order Nonlinear
Differential Equations with Multiple Deviating Arguments. Azerb. J. Math. 3 (1), (2013), 111-
126.
http://azjm.org/index.php/azjm/
[180] Tunç, C., Biçer, E., On the Hyers-Ulam stability of non-homogeneous Euler equations of
third and fourth order. Scientific Research and Essays. 8 (5), (2013), 220 -226.
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[62] Tunç, C., Some new stability and boundedness results on the solutions of the nonlinear
vector differential equations of second order, Iranian Journal of Science and Technology ,
Transaction A. Science, Vol. 30, No. A2, (2006), 213-221.
http://www.shirazu.ac.ir/en/index.php?page_id=1033
[61] Tunç, C., Some instability results on certain third order nonlinear vector differential
equations, BULLETIN of the Institute of Mathematics Academia Sinica (N.S.), Volume 2,
Number 1, (2007), 109-122.
http://www.math.sinica.edu.tw/bulletin/
[60] Tunç, C., On the boundedness of solutions of certain nonlinear vector differential equations
of third order, Bulletin Mathématique de la Société des Sciences Mathématiques de Roumanie,
Tome 49 (97), (2006), no. 3, 290-299.
http://rms.unibuc.ro/bulletin/
[59] Tunc, C., Stability and boundedness of solutions to certain fourth-order differential
equations, Electron. J. Diff. Eqns., Vol. 2006(2006), No. 35, pp. 1-10.
http://ejde.math.txstate.edu/
[58] Tunç, C., About uniform boundedness and convergence of solutions certain non-linear
differential equations of fifth order. Bulletin of the Malaysian Mathematical Sciences Society ,
Vol 30, No 1, (2007), 1-12.
http://math.usm.my/bulletin/html/scope.htm
[57] Tunç, C. ; Tunç, E. (2006) New ultimate boundedness and periodicity results for certain
third-order nonlinear vector differential equations, Mathematical Journal of Okayama
University, 48 (2006), 159-172.
http://www.math.okayama-u.ac.jp/mjou/
[56] Tunç, C. About stability and boundedness of solutions of certain fourth order differential
equations, Nonlinear Phenomena in Complex Systems, 9(4), (2006), 380-387.
http://www.j-npcs.org/
[55] Tunç, C.; Ateş, M. On the Periodicity Results for Solutions of Some Certain Third Order
Nonlinear Differential Equations, Advances in Mathematical Sciences and Applications,
Volume 16, Number 1, (2006), 1-14.
http://www1.gifu-u.ac.jp/~aiki/AMSA/
[54] Tunç, C. New results about instability of nonlinear ordinary vector differential equations
of sixth and seventh orders, Dynamics of Continuous, Discrete and Impulsive Systems; DCDIS
Series A: Mathematical Analysis, Volume 14, Number1, (2007) 123-136.
http://monotone.uwaterloo.ca/~journal/
[53] Tunç, C. ; Tunç, E. (2006) An instability theorem for a class of eighth order differential
equations, Differential Equations (Differ. Uravn.) Tom 42, No.1, (2006) 150-154.
http://www.springerlink.com/openurl.asp?genre=journal&issn=0012-2661
[52] Tunç, C. (2006) Stability results for the solutions of certain non-autonomous differential
equations of fifth order, Proyecciones, Journal of Mathematics , 25 (1), (2006) 1-18.
http://www.scielo.cl/scielo.php?script=sci_serial&pid=0716-0917&lng=en&nrm=iso
[51] Tunç, C.; Şevli, H. (2007) Stability and boundedness properties of certain second order
differential equations, Journal of the Franklin Institute, Engineering and Applied Mathematics
344(5), (2007), 399-405 .
http://www.sciencedirect.com/science/journal/00160032
[50] Tunç, C. ; Tunç, E. (2005) Instability of solutions of certain nonlinear vector differential
equations of order seven, Iranian Journal of Science and Technology , Transaction A. Science
29 (A3): 515-521.
http://hafez.shirazu.ac.ir/~journals/ijst.htm
[49] Tunç, C.; Tunç, E. (2007) On the asymptotic behavior of solutions of certain second-order
differential equations, Journal of the Franklin Institute, Engineering and Applied Mathematics
344 (5), (2007), 391-398 .
http://www.sciencedirect.com/science/journal/00160032
[48] Tunç, C.; Ateş, M. (2006) Stability and boundedness results for solutions of certain third
order nonlinear vector differential equations, Nonlinear Dynamics. An International Journal of
Nonlinear Dynamics and Chaos in Engineering Systems, Volume 45, Numbers 3-4, Date:
August 2006, 273 - 281.
http://www.springerlink.com/openurl.asp?genre=journal&issn=0924-090X
[47] Tunç, C. (2006) On the stability of solutions of certain fourth-order delay differential
equations. Applied Mathematics and Mechanics (English Edition), Vol.27, No.8, (2006), 1141-
1148.
http://www.springerlink.com/openurl.asp?genre=journal&issn=0253-4827
[46] Tunç, C. (2005) Some stability and boundedness results for the solutions of certain fourth
order differential equations. Acta Universitatis Palackiana Olomucensis, Facultas Rerum
Naturalium, Mathematica 44, 161-171.
http://mant.upol.cz/cs/acta_math.asp
[45] Tunç, C. ; Tunç, E. (2004) A result on the instability of solutions of certain non-
autonomous vector differential equations of fourth order. East-West Journal of Mathematics
6(2), (2004), 153-160.
http://math.boisestate.edu/~ewjm/index.html
[44] Tunç, C. (2006) New results about stability and boundedness of solutions of certain non-
linear third-order delay differential equations, The Arabian Journal for Science and
Engineering, Volume 31, Number 2A, (2006), 185-196.
http://www.kfupm.edu.sa/publications/ajse/
[43] Tunç, C.; Şevli, H. On the instability of solutions of certain fifth order nonlinear
differential equations, Mem. Differential Equations Math. Phys. 35 (2005), 147-156.
http://www.emis.ams.org/journals/MDEMP/index.html
[42] Tunç, C. On the asymptotic behavior of solutions of certain third-order nonlinear
differential equations. Journal of Applied Mathematics and Stochastic Analysis 2005, No.1, 29-
35 (2005).
http://www.hindawi.com/journals/jamsa/index.html
[41] Tunç, C. (2005) Boundedness of solutions of a third-order nonlinear differential equation.
Journal of Inequalities in Pure and Applied Mathematics 6 (2005), no.1, 1-6.
http://jipam.vu.edu.au
[40] Tunç, C. Uniform ultimate boundedness solutions of third-order nonlinear differential
equations, Kuwait Journal of Science and Engineering Volume : 32 (1), (2005) 39-48.
http://www.kjse.kuniv.edu.kw/english/default.asp
[39] Tunç, C. Instability of solutions of a certain non-autonomous vector differential
equation of eighth-order, Annals of Differential Equations, Vol. 22, No.1, 2006, 7-12.
http://www.fzu.edu.cn/h03/aode/
[38] Tunç, C. An ultimate boundedness result for a certain system of fourth order nonlinear
differential equations. Differential Equations and Applications, Vol. 5 (2007), 163-174.
https://www.novapublishers.com/catalog/product_info.php?products_id=4071
[37] Tunç, C. Some stability results for the solutions of certain fourth order delay differential
equations. Differential Equations and Applications, Vol. 4 (2007), 133-140.
https://www.novapublishers.com/catalog/product_info.php?products_id=4071
[36] Tunç, C. An instability result for a certain non-autonomous vector differential equation of
fifth-order. Pan-American Mathematical Journal, 15(3), (2005), 51-58.
www.internationalpubls.com
[35] Tunç, C. A further instability result for a certain vector differential equation of fourth
order, Int. J. Math. Game Theory Algebra 15 (2006), no. 5, 489-495.
https://www.novapublishers.com/catalog/product_info.php?products_id=1712
[34] Tunç, C. (2004) A result on the asymptotic behaviour of solutions of certain non-
autonomous differential equations of the fifth order. Nonlinear Phenomena in Complex
Systems, 7(4), 359-367.
http://www.j-npcs.org/
[33] Tunç, C. (2004) On the instability of solutions of certain nonlinear vector differential
equations of fifth order. Pan-American Mathematical Journal, 14 (4), 25-30.
www.internationalpubls.com
[32] Tunç, C. (2004) Global stability of solutions of certain third-order nonlinear differential
equations. Pan-American Mathematical Journal, 14 (4) , 31-37.
www.internationalpubls.com
[31] Tunç, C. (2004) On the instability of certain sixth-order nonlinear differential equations.
Electron. J. Diff. Eqns., Vol. 2004 (2004), No. 117, pp. 1-6.
http://ejde.math.txstate.edu/
[30] Tunç, C. (2004) An instability theorem for a certain vector differential equation of the
fourth order. Journal of Inequalities in Pure and Applied Mathematics 5 (2004), no.1, 1-5.
http://jipam.vu.edu.au
[29] Tunç, C. (2004) An instability result for certain system of sixth order differential
equations. Applied Mathematics and Computation, 157 (2), 477-481.
http://www.elsevier.com/locate/issn/0096-3003
[28] Tunç, C. (2004) A note on the stability and boundedness results of solutions of certain
fourth order differential equations. Applied Mathematics and Computation, 155 (3), 837-843.
http://www.elsevier.com/locate/issn/0096-3003
[27] Tunç, C. (2004) A study of the asymptotic behaviour of solutions of certain non-
autonomous differential equations of the fifth order. Applied Mathematics and Computation
154 (1), 103-113.
http://www.elsevier.com/locate/issn/0096-3003
[26] Tunç, C.; Tunç, E. (2004) On the asymptotic behaviour of solutions of certain non-
autonomous differential equations. Applied Mathematics and Computation 151 (2), 363-378.
http://www.elsevier.com/locate/issn/0096-3003
[25] Tunç, C.( 2003) On the asymptotic behaviour of solutions of certain fifth-order ordinary
differential equations. Applied Mathematics and Mechanics (English Edition) 24(8), 893-901.
http://www.springerlink.com/openurl.asp?genre=journal&issn=0253-4827
[24] Tunç, C. (2002) A study of the stability and boundedness of the solutions of nonlinear
differential equations of the fifth order. Indian J. Pure Appl. Math. 33 , no.4, 519-529.
http://www.insa.ac.in/html/home.asp
[23] Tunç, C. (2001) Boundedness and uniform boundedness results for certain non-
autonomous differential equations of fourth order. Appl. Math. Mech. (English Ed.) 22 (11),
1273-1278.
http://www.springerlink.com/openurl.asp?genre=journal&issn=0253-4827
[22] Tunç, C. (2000) Boundedness and periodicity of fifth order non-linear differential
equations. Bull. Greek Math. Soc. 43, 55-69.
[21] Tunç, C. (1999) On the uniform boundedness of solutions of some non-autonomous
differential equations of the fourth order. Chinese translation in Appl. Math. Mech. 20, no. 6,
585-591. Appl. Math. Mech. (English Ed.) 20, no.6, 622-628.
http://www.springerlink.com/openurl.asp?genre=journal&issn=0253-4827
[20] Tunç, C. (1999) On the boundedness and periodicity of the solutions of a certain vector
differential equation of third-order. Appl. Math. Mech. 20 (2), 153-160.
http://www.springerlink.com/openurl.asp?genre=journal&issn=0253-4827
[19] Tunç, C. (1998) A global stability result for a certain system of fifth order nonlinear
differential equations. Acta Comment. Univ. Tartu. Math. No. 2 , 3-13.
[18] Tunç, C. (1998) A stability result for a certain system of fourth order nonlinear differential
equations. An. Univ. Bucurecsti Mat. 47, no. 1, 109-120.
[17] Tunç, C. (1998) On the ultimate boundedness result for the solutions of certain fourth
order differential equations. Ann. Differential Equations 14 (3), 475-485.
http://www.fzu.edu.cn/h03/aode/
[16] Tunç, C. (1997) Nonoscillation criteria for a class of nonlinear differential equations of
third order. Bull. Greek Math. Soc. 39, 131-137.
[15] Tunç, C. (1997) Boundedness and stability results for a certain system of fifth order
nonlinear differential equations. Istanbul Üniv. Fen Fak. Mat. Derg. 55/56 , 179-188 .
[14] Tunç, C. (1997) A ultimate boundedness result for the solutions of certain fifth order non-
linear differential equations. Punjab Univ. J. Math. (Lahore), 125-141.
[13] Tunç, C. (1997) On the non-oscillation of solutions of non-homogeneous third order
differential equations. Soochow J. Math. 23 (1), 1-7.
http://www.math.scu.edu.tw/sjm-web/home.htm
[12] Tunc, C. (1996) On the boundedness and the stability results for the solution of certain
fifth order differential equations. Ann. Differential Equations 12 (3), 259-266.
http://www.fzu.edu.cn/h03/aode/
[11] Tunç, C. (1996) On the asymptotic behaviour of solutions of certain fourth order non-
autonomous differential equations. Studia Univ. Babeş-Bolyai Math. 41(3), 95-105.
http://www.cs.ubbcluj.ro/~studia-m/editors.php
[10] Tiryaki, A.; Tunç, C. (1996) Boundedness and stability properties of solutions of certain
fourth order differential equations via the intrinsic method. Analysis 16 (4), 325-334.
http://www.oldenbourg.de/verlag/analysis-international/
[9] Tunç, C. (1996) A boundedness result for certain fourth order differential equations. Bull.
Calcutta Math. Soc. 88, no. 2, 113-120.
[8] Tunc, C.; Tiryaki, A. (1996) On the boundedness and the stability results for the solution
of certain fourth order differential equations via the intrinsic method. Appl. Math. Mech.
(English Ed.) 17 (11), 1039-1049.
http://www.springerlink.com/openurl.asp?genre=journal&issn=0253-4827
[7] Tiryaki, A.; Tunç, C. (1996) On the boundedness and the stability properties for the
solutions of certain fifth order differential equations. Hacet. Bull. Nat. Sci. Eng. Ser. B 25, 53-
68.
[6] Tunç, C. (1995) On the boundedness and the stability results for the solutions of certain fifth
order differential equations. Istanbul Üniv. Fen Fak. Mat. Derg. 54, 151-160.
[5] Tunç, C. (1995) On the stability and the boundedness properties of solutions of certain
fourth order differential equations. Istanbul Üniv. Fen Fak. Mat. Derg. 54 , 161-173.
[4] Tiryaki, A.; Tunç, C. (1995) Constructing Lyapunov functions for certain fourth-order
autonomous differential equations. Indian J. Pure Appl. Math. 26 (3), 225-232.
http://www.insa.ac.in/html/home.asp
[3] Tunc, C. (1995)On the stability result for the solution of certain fourth order differential
equations. Pure Appl. Math. Sci. 42 (1995), no. 1-2, 75-84.
[2] Tunç, C. On the boundedness and the stability properties of solution of certain fifth order
differential equations. An. Univ. Timisoara Ser. Mat.Inform. 33, no. 1, (1995) 147-159.
http://www.math.uvt.ro/anmath/index.html
[1] Tunç, C. (1994) On the asymptotic behaviour of solutions of some differential equations of
the fourth order. Studia Univ. Babeş-Bolyai Math. 39 (2), 87-96.
http://www.cs.ubbcluj.ro/~studia-m/editors.php
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Production and Hosting by Taylor & Francis Group
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18) Editor of
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“PROGRESS”
Baku, Azerbaijan-2011, 2012, 2013 (Three Books).
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2) Mathematical Reviewer of Zentralblatt MATH.
3) Member of RGMIA, http://rgmia.vu.edu.au/members
Conference Proceedings:
[32] Tunc, C. , Pseudo almost periodic solutions forfunctional differential equations of first
order. 4th International Conference on Mathematics & Information Science (ICMIS 2015),
Zewail City of Science and Technology, Cairo-Egypt, 5-7 Feb. 2015.
[31] Tunc, C. , International Conference on Recent Advances in Applied Mathematics.
December 17-18, Lahore-Pakistan.
[30] Tunc, C., On the stability and boundedness of solutions to Volterra integro-differential
equations with delay. International Conference on Advancements in Mathematical Sciences
(AMS). 5-7 Kasım, 2015, Antalya-Turkey.
[29] Tunc, C., 6th INTERNATIONAL CONFERENCE ON MODELING, SIMULATION
AND APPLIED OPTIMIZATION. Dedicated to the memory of Late Ibrahim El-SadekMay
27 – 29, 2015 Yildiz Technical University, Istanbul, Turkey.
[28] Tunc, C. , Pseudo almost periodic solutions forfunctional differential equations of first
order. 4th International Conference on Mathematics & Information Science (ICMIS 2015),
Zewail City of Science and Technology, 5-7 Feb. 2015.
[27] Tunc, C. , On the Pseudo almost periodic solutions for HCNNs with time-varying leakage
delays International Conference on Advances in Applied Mathematics ICAAM-2014
Hammamet, 22-25 December, 2014, Tunisia
[26] Tunc, C. , A comparison on the stability of a functional differential equation of second
order by fixed point theory and Lyapunov theory. The Azerbaijan National Academy of
Sciences, 13-18 Mayıs 2014, Baku, Azerbaijan.
[26] Tunc, C. , Fixed points and stability in nonlinear differential equations with variable delay.
“3rd International Conference on Mathematics & Information Science”. December 28-30,
2013, Luxor-Egypt.
[25] Tunc,C., On the existence of periodic solutions of differential equations of higher order
Workshop on Control Theory and Applications, 15-19 December, 2012, Mahdia-Tunis.
[24] Tunc, C., Stability and boundedness in multi delay vector Liénard equation. Algerian-
Turkish International days on Mathematics 2012 ATIM’2012. University Badji Mokhtar
Annaba, 9 - 11 October 2012, Annaba, Algeria.
[23] Tunc, C., On the Qualitative Behaviors of Solutions of Some Differential Equations with
Deviating Argument, April 19, 2012, Centro de Matematica e Aplicacoes Fundamentais,
University of Lisbon, PORTUGAL.
Tunc, C., Recent Advances on Qualitative Behaviours of Solutions of Some Differential
Equations of Higher Order with Multiple Deviating Arguments, September 10-13, 2011,
Sohag University, Sohag, Egypt.
[22] Tunc, C., On the boundedness and integrability of non-autonomous differential equations
of second order with variable deviating arguments. 9th Colloquium on the Qualitative Theory
of Differential Equations, June 28 - July 1, 2011, Szeged, Hungary. University of Szeged,
Bolyai Institute.
www.math.u-szeged.hu/9QTDE
[21] Tunc,C.,On the asymptotic stability of solutions of a class of neutral differential
equations with deviating argument, Workshop on Nonlinear Analysis and Applications,
December 16-19, 2010, Monastir-Tunis.
[20] Tunç, C., Stability, boundedness and uniform boundedness of solutions solutions of
nonlinear delay differential equations, The 8th AIMS Conference on Dynamical Systems,
Differential Equations and Applications, Dresden University of Technology,
Dresden , Germany, May 25 - 28, 2010.
[19] Tunç, C., On the qualitative behaviors of solutions of Liénard type equations with
multiple deviating arguments. International Conference on Analysis And Applications,
January 24-26, 2010, Sultan Qaboos University, Muscat, Oman.
[18] Tunc,C. Stability, boundedness and uniform boundedness of solutions solutions of second
order nonlinear differential equations, Workshop on Control Theory and Applications,
November 19-22, 2009, Monastir-Tunis.
[17] Tunç, C., On the qualitative behavior of some delay differential equations of higher order,
International Conference of Modeling, Simulation, and Applied Optimization (ICMSAO-09);
January 20-22, 2009, American University of Sharjah , Sharjah, UAE.
[16] Tunç, C., Nonlinear analysis and Geometric PDE: CIMPA Summer School
(Mathematics), June 15-24, 2008, Tsaghkadzor, Armenia.
[15] Tunç, C. Stability and boundedness of solutions to nonlinear delay differential equations,
Conference on Equations Différentielles Ordinaires, 24-29 May 2008, Mostaganem, Algeria.
[14] Tunç, C. On the stability and boundedness of solutions of some nonlinear differential
equations of fourth and fifth-order with delay, Fifth International Conference on Dynamic
Systems and Applications, May 30 - June 2, 2007, Morehouse College, Atlanta, Georgia,
USA.
[13] Tunç, C. On the stability of solutions to certain third and fourth-order delay differential
equations, International Congress of Mathematicians, ICM, August 22-30, 2006, Madrid-
SPAIN.
[12] Tunç, C. On the stability and boundedness of solutions to certain third-order delay
differential equations, 37.Annnual Iranian Mathematics Conference, Azarbaijan University,
September 2-5, 2006, Tabriz-IRAN.
[11] Tunç, C.; Karakaş, B. (2005) About boundedness of solutions of nonlinear vector
differential equations of third order, 14th Summer St. Petersburg Meeting in Mathematical
Analysis, June 6-11, Euler International Mathematical Institute, St. Petersburg, RUSSIA.
[10] Tunç, C.; Tunç, E. (2005) On the asymptotic behavior of solutions of certain second-order
differential equations, International Conference of Modeling, Simulation, and Applied
Optimization (ICMSAO-05); February 1-3, American University of Sharjah , Sharjah, UAE.
[9] Tunç, C.; Şevli, H. (2005) Stability and boundedness properties of certain second order
differential equations, International Conference of Modeling, Simulation, and Applied
Optimization (ICMSAO-05), February 1-3, American University of Sharjah , Sharjah, UAE.
[8] Tunç, C.; Şevli, H. (2004) On the instability of solutions of certain fifth order nonlinear
differential equations, Bunyakovsky International Conference (Kyiv-Ukrainia).
[7] Tunç, C.; Tunç, E. (2004) Some instability theorems for certain third and fourth order
nonlinear differential equations, Bunyakovsky International Conference (Kyiv-Ukrainia).
[6] Tunç, C. (2003) A result on the asymptotic behaviour of solutions of certain non-autonomus
differential equations of the fifth order XVI. Ulusal Matematik Sempozyumu, Yüzüncü Yıl
Üniversitesi, Van.
[5] Tunç, C. (2001) Boundedness and stability results for the solution of certain fourth order
autonomus, XIV. Ulusal Matematik Sempozyumu, Anadolu Üniversitesi, Eskişehir.
[4] Tunç, C. (2000) Boundedness and uniform boundedness results for certain non-autonomous
differential equations of fourth order, XIII. Ulusal Matematik Sempozyumu, Sabancı
Üniversitesi, İstanbul.
[3] Tunç, C. (1999) A study of the stability and boundedness of the solutions of nonlinear
differential equations of the fifth order, XII. Ulusal Matematik Sempozyumu, İnönü
Üniversitesi, Malatya.
[2] Tunç, C. (1997) A stability result for a certain system of fourth order nonlinear differential
equations, X. Ulusal Matematik Sempozyumu, Abant İzzet Baysal Üniversitesi, Bolu.
[1] Tunç, C. (1996) Boundedness and stability results for a certain system of fifth order
nonlinear differential equations, IX. Ulusal Matematik Sempozyumu, İstanbul Teknik
Üniversitesi, İstanbul.