@article{10_4153_CJM_1970_066_1,
     author = {Read, R. C. and Wright, E. M.},
     title = {Coloured {Graphs:} {A} {Correction} and {Extension}},
     journal = {Canadian journal of mathematics},
     pages = {594--596},
     year = {1970},
     volume = {22},
     number = {3},
     doi = {10.4153/CJM-1970-066-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1970-066-1/}
}