@article{03618357, title = {A simplification of D'Alarcao's idempotent separating extensions of inverse semigroups.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {1}, year = {1978}, pages = {393-396}, doi = {10.1155/S0161171278000393}, zbl = {0398.20064}, language = {en}, url = {http://dml.mathdoc.fr/item/03618357} }
Edwards, Constance C. A simplification of D'Alarcao's idempotent separating extensions of inverse semigroups.. International Journal of Mathematics and Mathematical Sciences, Tome 1 (1978) pp. 393-396. doi : 10.1155/S0161171278000393. http://gdmltest.u-ga.fr/item/03618357/