Fayed A, Alfrgany S, Makhzoum H. The Existence and Uniqueness of Periodic Solutions for Nonlinear Neutral first order differential equation with Functional Delay. ES [انترنت]. 22 مارس، 2022 [وثق 23 أغسطس، 2026];(8). موجود في: https://next.fannak.com/index.php/FESJ/article/view/800