%0 Journal Article
%A Filippakis, Michael E.
%A Papageorgiou, Nikolaos S.
%T A nonlinear periodic system with nonsmooth potential of indefinite sign
%J Archivum mathematicum
%D 2006
%P 205-213
%V 42
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ARM_2006__42_3_a0/
%G en
%F ARM_2006__42_3_a0