Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{SF_1978__16_134272, author = {T.E. Hall}, title = {Inverse semigroup varieties with the amalgamation property.}, journal = {Semigroup forum}, pages = {37--52}, publisher = {mathdoc}, volume = {16}, year = {1978}, zbl = {0396.20039}, url = {http://geodesic.mathdoc.fr/item/SF_1978__16_134272/} }
T.E. Hall. Inverse semigroup varieties with the amalgamation property.. Semigroup forum, Tome 16 (1978), pp. 37-52. http://geodesic.mathdoc.fr/item/SF_1978__16_134272/