%0 Journal Article
%A Jens Frehse
%T A Landesman-Lazer alternative theorem for a class of optimization problems.
%J Commentarii mathematici Helvetici
%D 1979
%P 328-333
%V 54
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMH_1979__54_139787/
%F CMH_1979__54_139787