TY - JOUR AU - V. V. Nikulin TI - On arithmetic groups generated by reflections in Lobachevskii spaces JO - Izvestiya. Mathematics PY - 1981 SP - 573 EP - 601 VL - 16 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IM2_1981_16_3_a4/ LA - en ID - IM2_1981_16_3_a4 ER -