一类二阶泛函微分方程周期解存在性问题

任景莉;葛渭高

On the Existence of Periodic Solutions for the Second Order Functional Differential Equation

Ling Li REN(1),Wei Gao GE(2)

数学学报 . 2004, (3): 569 -578 . DOI: 10.12386/A2004sxxb0072