TY - JOUR AU - Ĺ ulka, Robert TI - Nilpotency in semigroups and sublattices of their Booleans JO - Mathematica slovaca PY - 1987 SP - 147 EP - 158 VL - 37 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MASLO_1987__37_2_a1/ LA - en ID - MASLO_1987__37_2_a1 ER -