%0 Journal Article
%A P. Erdös
%T On an extremal problem in graph theory
%J Colloquium Mathematicum
%D 1964
%P 251-254
%V 13
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/cm-13-2-251-254/
%R 10.4064/cm-13-2-251-254
%G en
%F 10_4064_cm_13_2_251_254