TY  - JOUR
AU  - Greco, Carlo
TI  - Remarks on periodic solutions, with prescribed energy, for singular Hamiltonian systems
JO  - Commentationes Mathematicae Universitatis Carolinae
PY  - 1987
SP  - 661
EP  - 672
VL  - 28
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMUC_1987__28_4_a8/
LA  - en
ID  - CMUC_1987__28_4_a8
ER  -