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@article{DAN_1962_147_5_a0, author = {A. Arkhangel'skii}, title = {Open and almost open mappings of topological spaces}, journal = {Doklady Akademii Nauk}, pages = {999--1002}, publisher = {mathdoc}, volume = {147}, number = {5}, year = {1962}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1962_147_5_a0/} }
A. Arkhangel'skii. Open and almost open mappings of topological spaces. Doklady Akademii Nauk, Tome 147 (1962) no. 5, pp. 999-1002. http://geodesic.mathdoc.fr/item/DAN_1962_147_5_a0/