@article{EJDE_2004__2004__a110,
     author = {Alves,  Claudianor O. and de Morais Filho,  Daniel C. and Souto,  Marco Aurelio S.},
     title = {An application of the dual variational principle to a {Hamiltonian} system with discontinuous nonlinearities},
     journal = {Electronic journal of differential equations},
     year = {2004},
     volume = {2004},
     zbl = {1144.35374},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2004__2004__a110/}
}