TY - JOUR AU - V. V. Uspenskii TI - Extensions of topological groups with a countable net JO - Vestnik Moskovskogo universiteta. Matematika, mehanika PY - 1984 SP - 69 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/VMUMM_1984_3_a14/ LA - ru ID - VMUMM_1984_3_a14 ER -