%0 Journal Article
%A G. Bonanno
%A R. Livrea
%T Existence and Multiplicity of Periodic Solutions for Second Order Hamiltonian Systems Depending on a Parameter
%J Journal of convex analysis
%D 2013
%P 1075-1094
%V 20
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/JCA_2013_20_4_JCA_2013_20_4_a10/
%F JCA_2013_20_4_JCA_2013_20_4_a10