Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{SF_1978__16_134302, author = {M. Demlov\'a}, title = {On groups of units in a special class of monoids.}, journal = {Semigroup forum}, pages = {443--454}, publisher = {mathdoc}, volume = {16}, year = {1978}, zbl = {0398.20061}, url = {http://geodesic.mathdoc.fr/item/SF_1978__16_134302/} }
M. Demlová. On groups of units in a special class of monoids.. Semigroup forum, Tome 16 (1978), pp. 443-454. http://geodesic.mathdoc.fr/item/SF_1978__16_134302/