Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{SF_1970__1_133779, author = {T. Tamura}, title = {Finite union of commutative power joined semigroups.}, journal = {Semigroup forum}, pages = {75--84}, publisher = {mathdoc}, volume = {1}, year = {1970}, zbl = {0195.03501}, url = {http://geodesic.mathdoc.fr/item/SF_1970__1_133779/} }
T. Tamura. Finite union of commutative power joined semigroups.. Semigroup forum, Tome 1 (1970), pp. 75-84. http://geodesic.mathdoc.fr/item/SF_1970__1_133779/