Authors: Ding, Wei Qian, Ding Bian Wang, Chao Wang, Zhi Guo

Citation: Ding, Wei et al., Existence of periodic solutions of sublinear Hamiltonian systems, Acta mathematica Sinica. English series (Print) , 32(5), 2016, pp. 621-632

Authors: Wu, Yin Yin Qian, Ding Bian

Citation: Wu, Yin Yin et Qian, Ding Bian, Periodic solutions of singular second order equations at resonance, Acta mathematica Sinica. English series (Print) , 31(10), 2015, pp. 1599-1610