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@article{DE_1993_29_10_a7, author = {V. A. Baikov and R. K. Gazizov and N. H. Ibragimov}, title = {Approximate groups of transformations}, journal = {Differencialʹnye uravneni\^a}, pages = {1712--1732}, publisher = {mathdoc}, volume = {29}, number = {10}, year = {1993}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1993_29_10_a7/} }
V. A. Baikov; R. K. Gazizov; N. H. Ibragimov. Approximate groups of transformations. Differencialʹnye uravneniâ, Tome 29 (1993) no. 10, pp. 1712-1732. http://geodesic.mathdoc.fr/item/DE_1993_29_10_a7/