共 50 条
- [3] Existence of three periodic solutions for a nonlinear first order functional differential equation JOURNAL OF THE FRANKLIN INSTITUTE-ENGINEERING AND APPLIED MATHEMATICS, 2009, 346 (08): : 818 - 829
- [4] EXISTENCE AND POSITIVITY OF SOLUTIONS FOR A NONLINEAR PERIODIC DIFFERENTIAL EQUATION ARCHIVUM MATHEMATICUM, 2012, 48 (04): : 261 - 270
- [9] POSITIVE PERIODIC SOLUTIONS FOR A NONLINEAR FUNCTIONAL DIFFERENTIAL EQUATION MEMOIRS ON DIFFERENTIAL EQUATIONS AND MATHEMATICAL PHYSICS, 2010, 51 : 109 - 118