%0 Journal Article
%A Greco, Carlo
%T Remarks on periodic solutions, with prescribed energy, for singular Hamiltonian systems
%J Commentationes Mathematicae Universitatis Carolinae
%D 1987
%P 661-672
%V 28
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMUC_1987__28_4_a8/
%G en
%F CMUC_1987__28_4_a8