@article{SF_1992__45_3_135201,
     author = {S.M. Goberstein},
     title = {Perfect completely semisimple inverse semigroups.},
     journal = {Semigroup forum},
     pages = {395--397},
     publisher = {mathdoc},
     volume = {45},
     number = {3},
     year = {1992},
     zbl = {0773.20027},
     url = {http://geodesic.mathdoc.fr/item/SF_1992__45_3_135201/}
}