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@article{DE_1993_29_10_a9, author = {N. H. Ibragimov}, title = {Seven notes on group analysis}, journal = {Differencialʹnye uravneni\^a}, pages = {1739--1750}, publisher = {mathdoc}, volume = {29}, number = {10}, year = {1993}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1993_29_10_a9/} }
N. H. Ibragimov. Seven notes on group analysis. Differencialʹnye uravneniâ, Tome 29 (1993) no. 10, pp. 1739-1750. http://geodesic.mathdoc.fr/item/DE_1993_29_10_a9/