relation: http://acta.bibl.u-szeged.hu/42687/ title: Existence of weak quasi-periodic solutions for a second order Hamiltonian system with damped term via a PDE approach creator: Zhang Xingyong creator: Wang Liben date: 2016 type: Folyóirat type: NonPeerReviewed format: part language: hu identifier: http://acta.bibl.u-szeged.hu/42687/1/ejqtde_2016_109_001-014.pdf identifier: Zhang Xingyong; Wang Liben: Existence of weak quasi-periodic solutions for a second order Hamiltonian system with damped term via a PDE approach. (2016)