@article{INTA_1963_a5,
     author = {M. M. Postnikov},
     title = {Homotopy theory},
     journal = {Itogi Nauki i Tekhniki. Seriya Algebra. Geometriya. Topologiya },
     pages = {107--133},
     publisher = {mathdoc},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTA_1963_a5/}
}