Geodesic
Two theorems on the action-angle variables
Trudy Matematicheskogo Instituta imeni V.A. Steklova, Tome 24 (1969) no. 5 
N. N. Nekhoroshev. Two theorems on the action-angle variables. Trudy Matematicheskogo Instituta imeni V.A. Steklova, Tome 24 (1969) no. 5. http://geodesic.mathdoc.fr/item/RM_1969_24_5_a12/
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     author = {N. N. Nekhoroshev},
     title = {Two theorems on the action-angle variables},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     year = {1969},
     volume = {24},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1969_24_5_a12/}
}
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Voir la notice de l'article provenant de la source Math-Net.Ru

[1] E. T. Uitteker, Analiticheskaya dinamika, ONTI, M.–L., 1937

[2] A. Avez, V. Arnold, Problems ergodiquies de la mecanique classique, Paris, 1967 | MR