@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/}
}