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@article{DAN_1958_123_6_a5, author = {A. Markov}, title = {Unsolvability of certain problems in topology}, journal = {Doklady Akademii Nauk}, pages = {978--980}, publisher = {mathdoc}, volume = {123}, number = {6}, year = {1958}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1958_123_6_a5/} }
A. Markov. Unsolvability of certain problems in topology. Doklady Akademii Nauk, Tome 123 (1958) no. 6, pp. 978-980. http://geodesic.mathdoc.fr/item/DAN_1958_123_6_a5/