TY - JOUR AU - A. A. Gryzlov AU - E. S. Bastrykov TI - Some centered systems of sets and points defined by them JO - Trudy Instituta matematiki i mehaniki PY - 2011 SP - 76 EP - 82 VL - 17 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TIMM_2011_17_4_a6/ LA - ru ID - TIMM_2011_17_4_a6 ER -