中国科学院数学与系统科学研究院期刊网
AMS
A KAM Theorem for Reversible Systems of Infinite Dimension
Shun Qing CHEN, Xiao Ping YUAN
Acta Mathematica Sinica . 2007, (10): 1777 -1796 .  DOI: 10.1007/s10114-005-0887-8