TY - JOUR AU - N. Kh. Kasymov TI - Positive algebras with countable congruence lattices JO - Algebra i logika PY - 1992 SP - 21 EP - 37 VL - 31 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/AL_1992_31_1_a1/ LA - ru ID - AL_1992_31_1_a1 ER -