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@article{MZM_1986_40_3_a9, author = {A. D. Bruno}, title = {Stability in a {Hamiltonian} system}, journal = {Matemati\v{c}eskie zametki}, pages = {385--392}, publisher = {mathdoc}, volume = {40}, number = {3}, year = {1986}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1986_40_3_a9/} }
A. D. Bruno. Stability in a Hamiltonian system. Matematičeskie zametki, Tome 40 (1986) no. 3, pp. 385-392. http://geodesic.mathdoc.fr/item/MZM_1986_40_3_a9/