Zhang Xingyong and Wang Liben: Existence of weak quasi-periodic solutions for a second order Hamiltonian system with damped term via a PDE approach. (2016)
Zhang Xingyong: Existence and multiplicity of weak quasi-periodic solutions for second order Hamiltonian system with a forcing term. (2014)
Zhang Xingyong: Homoclinic orbits for a class of p-Laplacian systems with periodic assumption. (2013)
Zhang Xingyong: Infinitely many solutions for a class of second-order damped vibration systems. (2013)