%0 Journal Article
%A Petry, Walter
%T Existence theorems for operator equations and nonlinear elliptic boundary-value problems
%J Commentationes Mathematicae Universitatis Carolinae
%D 1973
%P 27-46
%V 14
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMUC_1973__14_1_a2/
%G en
%F CMUC_1973__14_1_a2