TY - JOUR AU - A. G. Chentsov TI - Closed Mappings and Construction of Extension Models JO - Trudy Instituta matematiki i mehaniki PY - 2023 SP - 274 EP - 295 VL - 29 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TIMM_2023_29_3_a16/ LA - ru ID - TIMM_2023_29_3_a16 ER -