Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{CMH_1970__45_139429, author = {Gerhard Ringel and J.W.T. Youngs}, title = {Das {Geschlecht} des vollst\"andigen dreif\"arbbaren {Graphen.}}, journal = {Commentarii mathematici Helvetici}, pages = {152--158}, publisher = {mathdoc}, volume = {45}, year = {1970}, zbl = {0192.60507}, url = {http://geodesic.mathdoc.fr/item/CMH_1970__45_139429/} }
Gerhard Ringel; J.W.T. Youngs. Das Geschlecht des vollständigen dreifärbbaren Graphen.. Commentarii mathematici Helvetici, Tome 45 (1970), pp. 152-158. http://geodesic.mathdoc.fr/item/CMH_1970__45_139429/