Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{ELMA_1968__23_140892, author = {F. Harary and D. Cartwright}, title = {On the {Coloring} of {Signed} {Graphs.}}, journal = {Elemente der Mathematik}, pages = {85--89}, publisher = {mathdoc}, volume = {23}, year = {1968}, zbl = {0155.31703}, url = {http://geodesic.mathdoc.fr/item/ELMA_1968__23_140892/} }
F. Harary; D. Cartwright. On the Coloring of Signed Graphs.. Elemente der Mathematik, Tome 23 (1968), pp. 85-89. http://geodesic.mathdoc.fr/item/ELMA_1968__23_140892/