Altman, Mieczyslaw
A theory of optimization and optimal control of nonlinear evolution and singular equations: applications to nonlinear partial differential equations
World Scientific, 1990
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Kelley, Walter G.
Difference equations : an introduction with applications / Walter G. Kelley, Allan C. Peterson.
Academic Press, 1991.
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Agarwal, Ravi P.
Nonoscillation theory of functional differential equations with applications
[Springer, ], 2012
eBooks
Campbell, Stephen L.
An introduction to differential equations and their applications
Wadsworth, 1990
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Farlow, Stanley J.
An introduction to differential equations and their applications
McGraw-Hill, 1994
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