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@article{DAN_1987_292_4_a7, author = {S. L. Ziglin}, title = {The absence of an additional first integral in a problem of the}, journal = {Doklady Akademii Nauk}, pages = {804--807}, publisher = {mathdoc}, volume = {292}, number = {4}, year = {1987}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1987_292_4_a7/} }
S. L. Ziglin. The absence of an additional first integral in a problem of the. Doklady Akademii Nauk, Tome 292 (1987) no. 4, pp. 804-807. http://geodesic.mathdoc.fr/item/DAN_1987_292_4_a7/