Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{ELMA_1969__24_140926, author = {G. Chartrand and M. Behzad}, title = {Line-Coloring of {Signed} {Graphs.}}, journal = {Elemente der Mathematik}, pages = {49--52}, publisher = {mathdoc}, volume = {24}, year = {1969}, zbl = {0175.50302}, url = {http://geodesic.mathdoc.fr/item/ELMA_1969__24_140926/} }
G. Chartrand; M. Behzad. Line-Coloring of Signed Graphs.. Elemente der Mathematik, Tome 24 (1969), pp. 49-52. http://geodesic.mathdoc.fr/item/ELMA_1969__24_140926/