%0 Journal Article %A Tanaka, Kazunaga %T Homoclinic orbits for a singular second order hamiltonian system %J Annales de l'I.H.P. Analyse non linéaire %D 1990 %P 427-438 %V 7 %N 5 %I Gauthier-Villars %U http://www.numdam.org/item/AIHPC_1990__7_5_427_0/ %G en %F AIHPC_1990__7_5_427_0