Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{SF_1985__31_134735, author = {T. Nordahl}, title = {Residual finiteness in permutation varieties of semigroups.}, journal = {Semigroup forum}, pages = {33--46}, publisher = {mathdoc}, volume = {31}, year = {1985}, zbl = {0552.20041}, url = {http://geodesic.mathdoc.fr/item/SF_1985__31_134735/} }
T. Nordahl. Residual finiteness in permutation varieties of semigroups.. Semigroup forum, Tome 31 (1985), pp. 33-46. http://geodesic.mathdoc.fr/item/SF_1985__31_134735/