共 50 条
- [44] Multiple periodic solutions for a class of second-order neutral functional differential equations [J]. Advances in Difference Equations, 2017
- [45] Multiple periodic solutions for a class of second-order neutral functional differential equations [J]. ADVANCES IN DIFFERENCE EQUATIONS, 2017,
- [48] Periodic Solutions of a Class of Nonlinear Systems of Ordinary Differential Equations [J]. Differential Equations, 2004, 40 : 502 - 514