TY - JOUR AU - Lee, Cheng TI - Infinitely many homoclinic orbits for Hamiltonian systems with group symmetries JO - Electronic journal of differential equations PY - 1999 VL - 1999 UR - http://geodesic.mathdoc.fr/item/EJDE_1999__1999__a64/ LA - en ID - EJDE_1999__1999__a64 ER -