@article{106739, author = {Vladim\'\i r Pu\v s}, title = {Representation of semigroups by products of simple graphs}, journal = {Commentationes Mathematicae Universitatis Carolinae}, volume = {030}, year = {1989}, pages = {227-234}, zbl = {0678.05060}, mrnumber = {1014122}, language = {en}, url = {http://dml.mathdoc.fr/item/106739} }
Puš, Vladimír. Representation of semigroups by products of simple graphs. Commentationes Mathematicae Universitatis Carolinae, Tome 030 (1989) pp. 227-234. http://gdmltest.u-ga.fr/item/106739/
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