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@article{DAN_1967_175_6_a8, author = {D. B. Fuchs}, title = {Duality of functors in the category of homotopy types}, journal = {Doklady Akademii Nauk}, pages = {1232--1235}, publisher = {mathdoc}, volume = {175}, number = {6}, year = {1967}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1967_175_6_a8/} }
D. B. Fuchs. Duality of functors in the category of homotopy types. Doklady Akademii Nauk, Tome 175 (1967) no. 6, pp. 1232-1235. http://geodesic.mathdoc.fr/item/DAN_1967_175_6_a8/