@article{1181071612,
author = {Fuzhong, Cong and Yong, Li and Dejun, Jin},
title = {Invariant Hyperbolic Tori for Hamiltonian Systems with R\"ussmann Nondegeneracy Conditions},
journal = {Rocky Mountain J. Math.},
volume = {29},
number = {4},
year = {1999},
pages = { 831-851},
language = {en},
url = {http://dml.mathdoc.fr/item/1181071612}
}
Fuzhong, Cong; Yong, Li; Dejun, Jin. Invariant Hyperbolic Tori for Hamiltonian Systems with Rüssmann Nondegeneracy Conditions. Rocky Mountain J. Math., Tome 29 (1999) no. 4, pp. 831-851. http://gdmltest.u-ga.fr/item/1181071612/