%0 Journal Article
%A Sobczyk, Andrew
%T Graph-Colouring and Combinatorial Numbers
%J Canadian journal of mathematics
%D 1968
%P 520-534
%V 20
%N 1
%U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1968-054-x/
%R 10.4153/CJM-1968-054-x
%F 10_4153_CJM_1968_054_x