@article{AIHPC_1989__6_5_331_0,
     author = {Rabinowitz, Paul H.},
     title = {Periodic and heteroclinic orbits for a periodic hamiltonian system},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {331--346},
     publisher = {Gauthier-Villars},
     volume = {6},
     number = {5},
     year = {1989},
     mrnumber = {1030854},
     zbl = {0701.58023},
     language = {en},
     url = {http://www.numdam.org/item/AIHPC_1989__6_5_331_0/}
}