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@article{DAN_1996_346_5_a2, author = {M. B. Sevryuk}, title = {Invariant tori of {Hamiltonian} systems that are nondegenerate in {R\"ussmann{\textquoteright}s} sense}, journal = {Doklady Akademii Nauk}, pages = {590--593}, publisher = {mathdoc}, volume = {346}, number = {5}, year = {1996}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1996_346_5_a2/} }
M. B. Sevryuk. Invariant tori of Hamiltonian systems that are nondegenerate in R\"ussmann’s sense. Doklady Akademii Nauk, Tome 346 (1996) no. 5, pp. 590-593. http://geodesic.mathdoc.fr/item/DAN_1996_346_5_a2/