TY - JOUR AU - Chajda, Ivan TI - Directly decomposable congruences in varieties with nullary operations JO - Mathematica slovaca PY - 1987 SP - 31 EP - 35 VL - 37 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MASLO_1987__37_1_a2/ LA - en ID - MASLO_1987__37_1_a2 ER -