TY  - JOUR
AU  - G. Bonanno
AU  - R. Livrea
TI  - Existence and Multiplicity of Periodic Solutions for Second Order Hamiltonian Systems Depending on a Parameter
JO  - Journal of convex analysis
PY  - 2013
SP  - 1075
EP  - 1094
VL  - 20
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/JCA_2013_20_4_JCA_2013_20_4_a10/
ID  - JCA_2013_20_4_JCA_2013_20_4_a10
ER  -