共 5 条
[1]
Duistermaat J. J.(1980)On global action-angles Comm. Pure Appl. Math. 33 687-706
[2]
Nekhoroshev N. N.(1972)The action-angle variables and their generalizations Tr. Mosk. Mat. Obshch. 26 181-198
[3]
Ercolani N.(1989)Painleve property and geometry Physica 34 303-346
[4]
Siggia E. D.(1998)Asymptotic method for the investigation of Ukr. Mat. Zh. 50 1366-1387
[5]
Samoilenko A. M.(undefined)-frequency oscillation systems undefined undefined undefined-undefined