Szulkin, Andrzej. "An Index Theory and Existence of Multiple Brake Orbits for Star-Shaped Hamiltonian Systems." Mathematische Annalen 283.3 (1989): 241-256. <http://eudml.org/doc/164506>.
@article{Szulkin1989, author = {Szulkin, Andrzej}, journal = {Mathematische Annalen}, keywords = {periodic solutions; Hamiltonian system; brake orbits; critical points; multiple critical points; relative index}, number = {3}, pages = {241-256}, title = {An Index Theory and Existence of Multiple Brake Orbits for Star-Shaped Hamiltonian Systems}, url = {http://eudml.org/doc/164506}, volume = {283}, year = {1989}, }
TY - JOUR AU - Szulkin, Andrzej TI - An Index Theory and Existence of Multiple Brake Orbits for Star-Shaped Hamiltonian Systems JO - Mathematische Annalen PY - 1989 VL - 283 IS - 3 SP - 241 EP - 256 KW - periodic solutions; Hamiltonian system; brake orbits; critical points; multiple critical points; relative index UR - http://eudml.org/doc/164506 ER -