Voir la notice de l'article provenant de la source Electronic Library of Mathematics
@article{EJDE_2001__2001__a192, author = {Fei, Guihua}, title = {Nontrivial periodic solutions of asymptotically linear {Hamiltonian} systems}, journal = {Electronic Journal of Differential Equations}, publisher = {mathdoc}, volume = {2001}, year = {2001}, language = {en}, url = {http://geodesic.mathdoc.fr/item/EJDE_2001__2001__a192/} }
Fei, Guihua. Nontrivial periodic solutions of asymptotically linear Hamiltonian systems. Electronic Journal of Differential Equations, Tome 2001 (2001). http://geodesic.mathdoc.fr/item/EJDE_2001__2001__a192/