Genqiang Wang, Jurang Yan, "Existence of periodic solution for first order nonlinear neutral delay equations", International Journal of Stochastic Analysis, vol. 14, Article ID 965952, 6 pages, 2001. https://doi.org/10.1155/S1048953301000144
Existence of periodic solution for first order nonlinear neutral delay equations
In this paper by using the coincidence degree theory, sufficient conditions are given for the existence of periodic solutions of the first order nonlinear neutral delay differential equation.
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