TY  - JOUR
AU  - Cockayne, E. J.
TI  - Colour Classes for r-Graphs
JO  - Canadian mathematical bulletin
PY  - 1972
SP  - 349
EP  - 354
VL  - 15
IS  - 3
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1972-063-2/
DO  - 10.4153/CMB-1972-063-2
ID  - 10_4153_CMB_1972_063_2
ER  -