@article{05312426, title = {Existence of four solutions of some nonlinear Hamiltonian system.}, journal = {Boundary Value Problems [electronic only]}, volume = {2008}, year = {2008}, doi = {10.1155/2008/293987}, zbl = {1144.37026}, language = {en}, url = {http://dml.mathdoc.fr/item/05312426} }
Jung, Tacksun; Choi, Q-Heung. Existence of four solutions of some nonlinear Hamiltonian system.. Boundary Value Problems [electronic only], Tome 2008 (2008) . doi : 10.1155/2008/293987. http://gdmltest.u-ga.fr/item/05312426/