@article{bwmeta1.element.desklight-ce18c0ad-7bdc-4dc6-9bcd-888934d64f25, author = {Mario Petrich}, title = {Free inverse semigroups}, journal = {Colloquium Mathematicae}, volume = {59}, year = {1990}, pages = {213-221}, zbl = {0716.20038}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.desklight-ce18c0ad-7bdc-4dc6-9bcd-888934d64f25} }
Mario Petrich. Free inverse semigroups. Colloquium Mathematicae, Tome 59 (1990) pp. 213-221. http://gdmltest.u-ga.fr/item/bwmeta1.element.desklight-ce18c0ad-7bdc-4dc6-9bcd-888934d64f25/