Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{SF_1981__23_134500, author = {A. Varisco and A. Cherubini}, title = {On conditionally commutative semigroups.}, journal = {Semigroup forum}, pages = {15--24}, publisher = {mathdoc}, volume = {23}, year = {1981}, zbl = {0471.20047}, url = {http://geodesic.mathdoc.fr/item/SF_1981__23_134500/} }
A. Varisco; A. Cherubini. On conditionally commutative semigroups.. Semigroup forum, Tome 23 (1981), pp. 15-24. http://geodesic.mathdoc.fr/item/SF_1981__23_134500/