%0 Journal Article
%A F. Ferschl
%T The Theory of Graphs and its Applications -  Berge, Claude
%J Metrika
%D 1963
%P 77-78
%V 7
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MET_1963__7_175200/
%F MET_1963__7_175200