@article{GDZPPN002332205,
title = {An Index Theory and Existence of Multiple Brake Orbits for Star-Shaped Hamiltonian Systems},
journal = {Mathematische Annalen},
volume = {283},
year = {1989},
pages = {241-256},
zbl = {0642.58030},
url = {http://dml.mathdoc.fr/item/GDZPPN002332205}
}
Szulkin, Andrzej. An Index Theory and Existence of Multiple Brake Orbits for Star-Shaped Hamiltonian Systems. Mathematische Annalen, Tome 283 (1989) pp. 241-256. http://gdmltest.u-ga.fr/item/GDZPPN002332205/