Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{CMUC_1989__30_2_a2, author = {Pu\v{s}, Vladim{\'\i}r}, title = {Representation of semigroups by products of simple graphs}, journal = {Commentationes Mathematicae Universitatis Carolinae}, pages = {227--234}, publisher = {mathdoc}, volume = {30}, number = {2}, year = {1989}, mrnumber = {1014122}, zbl = {0678.05060}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CMUC_1989__30_2_a2/} }
Puš, Vladimír. Representation of semigroups by products of simple graphs. Commentationes Mathematicae Universitatis Carolinae, Tome 30 (1989) no. 2, pp. 227-234. http://geodesic.mathdoc.fr/item/CMUC_1989__30_2_a2/