@article{DAN_1961_141_4_a13,
     author = {D. B. Fuchs},
     title = {On homotopy duality},
     journal = {Doklady Akademii Nauk},
     pages = {818--821},
     publisher = {mathdoc},
     volume = {141},
     number = {4},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1961_141_4_a13/}
}