@article{EJDE_1999__1999__a15,
     author = {Lee, Cheng},
     title = {Infinitely many homoclinic orbits for {Hamiltonian} systems with group symmetries},
     journal = {Electronic Journal of Differential Equations},
     publisher = {mathdoc},
     volume = {1999},
     year = {1999},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_1999__1999__a15/}
}