1. Separate contraction and existence of periodic solution in totally nonlinear delay differential equations;Adıvar;Hacettepe Journal of Mathematics and Statistics,2012
2. Existence of periodic solutions for totally nonlinear neutral differential equations with variable delay;Ardjouni;Sarajevo Journal of Mathematics,2012
3. Existence of positive periodic solutions for a nonlinear neutral differential equation with variable delay;Ardjouni;Applied Mathematics E-Notes,2012
4. Periodic solutions for a second-order nonlinear neutral differential equation with variable delay;Ardjouni;Electronic Journal of Differential Equations,2011
5. Existence of periodic solutions for nonlinear neutral dynamic equations with variable delay on a time scale;Ardjouni;Commun Nonlinear Sci Numer Simulat,2012