%0 Journal Article
%A Mawhin, Jean
%T Contractive mappings and periodically perturbed conservative systems
%J Archivum mathematicum
%D 1976
%P 67-73
%V 12
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ARM_1976__12_2_a1/
%G en
%F ARM_1976__12_2_a1