%0 Journal Article
%A M. Sabatini
%T Period function's convexity for Hamiltonian centers
 with separable variables
%J Annales Polonici Mathematici
%D 2005
%P 153-163
%V 85
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/ap85-2-5/
%R 10.4064/ap85-2-5
%G en
%F 10_4064_ap85_2_5