TY - JOUR AU - V. I. Stepanov TI - On the theory of models for intuitionistic logic JO - Sbornik. Mathematics PY - 1984 SP - 223 EP - 235 VL - 48 IS - 1 UR - http://geodesic.mathdoc.fr/item/SM_1984_48_1_a13/ LA - en ID - SM_1984_48_1_a13 ER -