%0 Journal Article
%A Papageorgiou, Nikolaos S.
%A Staicu, Vasile
%T Multiple Nontrivial Solutions for Doubly Resonant Periodic Problems
%J Canadian mathematical bulletin
%D 2010
%P 347-359
%V 53
%N 2
%U http://geodesic.mathdoc.fr/articles/10.4153/CMB-2010-030-4/
%R 10.4153/CMB-2010-030-4
%F 10_4153_CMB_2010_030_4