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@article{DAN_1971_197_6_a0, author = {V. G. Boltyanskii}, title = {Separability axioms and a metric}, journal = {Doklady Akademii Nauk}, pages = {1239--1242}, publisher = {mathdoc}, volume = {197}, number = {6}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1971_197_6_a0/} }
V. G. Boltyanskii. Separability axioms and a metric. Doklady Akademii Nauk, Tome 197 (1971) no. 6, pp. 1239-1242. http://geodesic.mathdoc.fr/item/DAN_1971_197_6_a0/