Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MAN_1964__153_161119, author = {G.A. DIRAC}, title = {Homomorphism {Theorems} for {Graphs.}}, journal = {Mathematische Annalen}, pages = {69--80}, publisher = {mathdoc}, volume = {153}, year = {1964}, zbl = {0115.41005}, url = {http://geodesic.mathdoc.fr/item/MAN_1964__153_161119/} }
G.A. DIRAC. Homomorphism Theorems for Graphs.. Mathematische Annalen, Tome 153 (1964), pp. 69-80. http://geodesic.mathdoc.fr/item/MAN_1964__153_161119/