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@article{DE_1987_23_12_a6, author = {V. V. Filippov}, title = {On a theorem of {Kneser}}, journal = {Differencialʹnye uravneni\^a}, pages = {2068--2074}, publisher = {mathdoc}, volume = {23}, number = {12}, year = {1987}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1987_23_12_a6/} }
V. V. Filippov. On a theorem of Kneser. Differencialʹnye uravneniâ, Tome 23 (1987) no. 12, pp. 2068-2074. http://geodesic.mathdoc.fr/item/DE_1987_23_12_a6/