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@article{DE_1984_20_8_a1, author = {E. E. Barbashina}, title = {A package with variable control {variations.~I}}, journal = {Differencialʹnye uravneni\^a}, pages = {1297--1308}, publisher = {mathdoc}, volume = {20}, number = {8}, year = {1984}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1984_20_8_a1/} }
E. E. Barbashina. A package with variable control variations.~I. Differencialʹnye uravneniâ, Tome 20 (1984) no. 8, pp. 1297-1308. http://geodesic.mathdoc.fr/item/DE_1984_20_8_a1/