TY - JOUR AU - Chajda, Ivan TI - Varieties with tolerance and congruence extension property JO - Archivum mathematicum PY - 1985 SP - 5 EP - 12 VL - 21 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ARM_1985__21_1_a1/ LA - en ID - ARM_1985__21_1_a1 ER -