Abou-El-Ela, A. M. A. , Sadek, A. I. and Mahmoud, A. M.


" Existence and uniqueness of a periodic solution for third-order delay differential equation with two deviating arguments, Existence and uniqueness of a periodic solution for third-order delay differential equation with two deviating arguments " IAENG International Journal of Applied Mathematics, 42(1), 7-12, 2012