@article{RSMUP_1991__85__201_0,
author = {Bessi, Ugo},
title = {Multiple closed orbits for singular conservative systems via geodesic theory},
journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
volume = {86},
year = {1991},
pages = {201-215},
mrnumber = {1142541},
zbl = {0850.70210},
language = {en},
url = {http://dml.mathdoc.fr/item/RSMUP_1991__85__201_0}
}
Bessi, Ugo. Multiple closed orbits for singular conservative systems via geodesic theory. Rendiconti del Seminario Matematico della Università di Padova, Tome 86 (1991) pp. 201-215. http://gdmltest.u-ga.fr/item/RSMUP_1991__85__201_0/
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