TY - JOUR AU - M. S. Nikol'skii TI - On controllable variants of the Richardson model in political science JO - Trudy Instituta matematiki i mehaniki PY - 2011 SP - 121 EP - 128 VL - 17 IS - 1 UR - http://geodesic.mathdoc.fr/item/TIMM_2011_17_1_a11/ LA - ru ID - TIMM_2011_17_1_a11 ER -