TY - JOUR AU - Goberstein, S.M. TI - Perfect completely semisimple inverse semigroups. JO - Semigroup forum PY - 1992 VL - 45 IS - 3 SP - 395 EP - 397 KW - congruences; perfect completely semisimple inverse semigroups UR - http://eudml.org/doc/135201 ER -