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@article{DAN_1964_155_2_a2, author = {F. W. Bauer}, title = {Universal homotopy groups}, journal = {Doklady Akademii Nauk}, pages = {254--257}, publisher = {mathdoc}, volume = {155}, number = {2}, year = {1964}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1964_155_2_a2/} }
F. W. Bauer. Universal homotopy groups. Doklady Akademii Nauk, Tome 155 (1964) no. 2, pp. 254-257. http://geodesic.mathdoc.fr/item/DAN_1964_155_2_a2/