%0 Journal Article
%A Vrkoč, Ivo
%T The class of functions fulfilling the inequality $\Vert f(x+z)-f(x)-f(y+z)+f(y) \Vert \le \Vert x-y \Vert \omega(\Vert z \Vert)$
%J Czechoslovak Mathematical Journal
%D 1969
%P 500-514
%V 19
%N 3
%U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1969.100917/
%R 10.21136/CMJ.1969.100917
%G en
%F 10_21136_CMJ_1969_100917