@article{TRSPY_1955_47_a0,
     author = {V. G. Boltyanskii},
     title = {Homotopy theory of continuous mappings and of vector fields},
     journal = {Informatics and Automation},
     pages = {3--199},
     publisher = {mathdoc},
     volume = {47},
     year = {1955},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1955_47_a0/}
}