TY - JOUR AU - V. S. Atabekyan TI - On normal subgroups in the periodic products of S.\,I.~Adian JO - Informatics and Automation PY - 2011 SP - 15 EP - 31 VL - 274 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TRSPY_2011_274_a2/ LA - ru ID - TRSPY_2011_274_a2 ER -