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@article{DAN_1992_326_3_a6, author = {M. B. Sevryuk}, title = {Invariant tori of reversible systems in the presence of additional even coordinates}, journal = {Doklady Akademii Nauk}, pages = {421--424}, publisher = {mathdoc}, volume = {326}, number = {3}, year = {1992}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1992_326_3_a6/} }
M. B. Sevryuk. Invariant tori of reversible systems in the presence of additional even coordinates. Doklady Akademii Nauk, Tome 326 (1992) no. 3, pp. 421-424. http://geodesic.mathdoc.fr/item/DAN_1992_326_3_a6/