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上一条:4.Xingfan Chen, Fei Guo*, Existence and Multiplicity of Periodic Solutions for Nonautonomous Second Order Hamiltonian Systems, Bound Value Probl. (2016) 2016:138,1-10.
下一条:2. Qianqian Nie, Fei Guo*.,Mingwei Wang,Generalized Nonsmooth Saddle Point Theorem and its Applications on Second Order Hamiltonian Systems,Chaos, Solitons & Fractals, 2017(104):741-747.