TY - JOUR AU - S. S. Marchenkov TI - Extensions of the positive closure operator by using logical connectives JO - Diskretnyj analiz i issledovanie operacij PY - 2018 SP - 46 EP - 58 VL - 25 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DA_2018_25_4_a3/ LA - ru ID - DA_2018_25_4_a3 ER -