1. Departament de Matemàtiques, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain;2. Department of Applied Mathematics, Babe?–Bolyai University, 1 Kogalniceanu str., 400084 Cluj–Napoca, Cluj, Romania
Abstract:
In this paper we give sufficient conditions for the existence of periodic solutions of delay differential equations with three delays.