TY - JOUR AU - V. S. Zhuravskii TI - On the group of abelian extensions of abelian groups JO - Doklady Akademii Nauk PY - 1960 SP - 29 EP - 32 VL - 134 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1960_134_1_a6/ LA - ru ID - DAN_1960_134_1_a6 ER -