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@article{DAN_1976_230_1_a4, author = {N. H. Ibragimov}, title = {Lie--B\"acklund groups and conservation laws}, journal = {Doklady Akademii Nauk}, pages = {26--29}, publisher = {mathdoc}, volume = {230}, number = {1}, year = {1976}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1976_230_1_a4/} }
N. H. Ibragimov. Lie--B\"acklund groups and conservation laws. Doklady Akademii Nauk, Tome 230 (1976) no. 1, pp. 26-29. http://geodesic.mathdoc.fr/item/DAN_1976_230_1_a4/