Geodesic
On a homotopy invariant
Differencialʹnye uravneniâ, Tome 11 (1975) no. 6, pp. 1139-1140.

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     author = {G. S. Osipenko},
     title = {On a homotopy invariant},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1139--1140},
     publisher = {mathdoc},
     volume = {11},
     number = {6},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1975_11_6_a20/}
}
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G. S. Osipenko. On a homotopy invariant. Differencialʹnye uravneniâ, Tome 11 (1975) no. 6, pp. 1139-1140. http://geodesic.mathdoc.fr/item/DE_1975_11_6_a20/