people.duke.edupeople.duke.edu/~hpgavin/SystemID/References/Gopinath-BSTJ-1969.pdfBy B. GOPINATH...
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people.duke.edupeople.duke.edu/~hpgavin/SystemID/References/Gopinath-BSTJ-1969.pdfBy B. GOPINATH (Manuscript received December 17, 1968) ... u' and sum from s = 1 to s = N where N