@article{GDZPPN001262165, title = {Perfect completely semisimple inverse semigroups.}, journal = {Semigroup forum}, volume = {44}, year = {1992}, pages = {395-397}, zbl = {0773.20027}, url = {http://dml.mathdoc.fr/item/GDZPPN001262165} }
Goberstein, S.M. Perfect completely semisimple inverse semigroups.. Semigroup forum, Tome 44 (1992) pp. 395-397. http://gdmltest.u-ga.fr/item/GDZPPN001262165/