TY - JOUR AU - D. V. Lytkina TI - Algebraically nonequivalent constructivization for JO - Algebra i logika PY - 1990 SP - 659 EP - 674 VL - 29 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/AL_1990_29_6_a3/ LA - ru ID - AL_1990_29_6_a3 ER -