共 50 条
- [44] Existence of n positive solutions to a nonlinear second-order periodic boundary value problem Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science), 2009, 33 (04): : 175 - 178
- [48] Existence of positive solution for second-order impulsive boundary value problems on infinity intervals Boundary Value Problems, 2006