Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{SF_1971__3_133855, author = {K. Keimel}, title = {Congruence relations on cone semigroups.}, journal = {Semigroup forum}, pages = {130--147}, publisher = {mathdoc}, volume = {3}, year = {1971}, zbl = {0231.22002}, url = {http://geodesic.mathdoc.fr/item/SF_1971__3_133855/} }
K. Keimel. Congruence relations on cone semigroups.. Semigroup forum, Tome 3 (1971), pp. 130-147. http://geodesic.mathdoc.fr/item/SF_1971__3_133855/