@article{GDZPPN002337037,
title = {The compact category and mulitple periodic solutions of Hamiltionian systems on symmetric starshaped energy surfaces.},
journal = {Mathematische Annalen},
volume = {293},
year = {1992},
pages = {523-542},
zbl = {0735.58029},
url = {http://dml.mathdoc.fr/item/GDZPPN002337037}
}
Bartsch, Thomas; Clapp, Mónica. The compact category and mulitple periodic solutions of Hamiltionian systems on symmetric starshaped energy surfaces.. Mathematische Annalen, Tome 293 (1992) pp. 523-542. http://gdmltest.u-ga.fr/item/GDZPPN002337037/