@article{INTF_1988_24_a1,
     author = {O. Ya. Viro and D. B. Fuchs},
     title = {Introduction to homotopy theory},
     journal = {Itogi Nauki i Tekhniki. Seriya Sovremennye Problemy Matematiki. Fundamental'nye Napravleniya },
     pages = {6--121},
     publisher = {mathdoc},
     volume = {24},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTF_1988_24_a1/}
}