Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{SF_1972__4_133916, author = {H.E. Scheiblich}, title = {Free inverse semigroups.}, journal = {Semigroup forum}, pages = {351--359}, publisher = {mathdoc}, volume = {4}, year = {1972}, zbl = {0259.20054}, url = {http://geodesic.mathdoc.fr/item/SF_1972__4_133916/} }
H.E. Scheiblich. Free inverse semigroups.. Semigroup forum, Tome 4 (1972), pp. 351-359. http://geodesic.mathdoc.fr/item/SF_1972__4_133916/