: In this paper, on the basis of Krasnoselskii’s fixed point theorem, sufficient conditions are derived for the existence of periodic solutions to certain nonlinear neutral differential equations of first order with multiple retarded arguments. Our results extend and improve some related ones in the literature.
Emel Biçer, Cemil Tunç. (2015) On the Existence of Periodic Solutions to Non-Linear Neutral Differential Equations of First Order with Multiple Delays, , Volume 52, Issue 1.
