%0 Journal Article
%A To Fu Ma
%T A note on the existence of two nontrivial solutions of a resonance problem.
%J Portugaliae mathematica
%D 1994
%P 517-523
%V 51
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/PORMA_1994__51_4_47276/
%G en
%F PORMA_1994__51_4_47276