@article{VMUMM_1984_3_a14,
     author = {V. V. Uspenskii},
     title = {Extensions of topological groups with a countable net},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {69},
     publisher = {mathdoc},
     number = {3},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1984_3_a14/}
}