TY - JOUR AU - Petrich, Mario TI - Bases for certain varieties of completely regular semigroups JO - Commentationes Mathematicae Universitatis Carolinae PY - 2021 SP - 41 EP - 65 VL - 62 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.14712/1213-7243.2021.005/ DO - 10.14712/1213-7243.2021.005 LA - en ID - 10_14712_1213_7243_2021_005 ER -