%0 Journal Article
%A Fučík, Svatopluk
%A Nečas, Jindřich
%A Souček, Jiří
%A Souček, Vladimír
%T Strengthening upper bound for the number of critical levels of nonlinear functionals
%J Commentationes Mathematicae Universitatis Carolinae
%D 1972
%P 297-310
%V 13
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMUC_1972__13_2_a7/
%G en
%F CMUC_1972__13_2_a7