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@article{DAN_1971_201_3_a3, author = {N. S. Lashnev}, title = {On factor mappings of topological spaces}, journal = {Doklady Akademii Nauk}, pages = {531--534}, publisher = {mathdoc}, volume = {201}, number = {3}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1971_201_3_a3/} }
N. S. Lashnev. On factor mappings of topological spaces. Doklady Akademii Nauk, Tome 201 (1971) no. 3, pp. 531-534. http://geodesic.mathdoc.fr/item/DAN_1971_201_3_a3/