TY - JOUR AU - I. T. Mukhamet'yanov TI - Block designs associated with normal subsets of finite groups JO - Trudy Instituta matematiki i mehaniki PY - 1996 SP - 71 EP - 82 VL - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TIMM_1996_4_a4/ LA - ru ID - TIMM_1996_4_a4 ER -