%0 Journal Article
%A Cockayne, E. J.
%T Colour Classes for r-Graphs
%J Canadian mathematical bulletin
%D 1972
%P 349-354
%V 15
%N 3
%U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1972-063-2/
%R 10.4153/CMB-1972-063-2
%F 10_4153_CMB_1972_063_2