TY - JOUR AU - Chajda, Ivan TI - A principal congruence identity characterizing the variety of distributive lattices with zero JO - Mathematica slovaca PY - 1990 SP - 129 EP - 131 VL - 40 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MASLO_1990__40_2_a3/ LA - en ID - MASLO_1990__40_2_a3 ER -