On associate subgroups of regular semigroups
T. S. Blyth, Paula Mendes Martins · Communications in Algebra · 1997
We describe the structure of a regular semigroup with an associate subgroup the identiy element of which is a mcdial idempotent. As a particular application of this, we obtain the structure of perfect Dubreil-Jacotin semigroups in which the set of residuals of the bimaximum element form a subgroup.