Perturbation to Mei symmetry and Mei adiabatic invariants for mechanical systems in phase space
张明江, 方建会, 张小妮, 路凯
Perturbation to Mei symmetry and Mei adiabatic invariants for mechanical systems in phase space
Zhang Ming-Jiang(张明江), Fang Jian-Hui(方建会), Zhang Xiao-Ni(张小妮), and Lu Kai(路凯)
中国物理B . 2008, (6): 1957 -1961 .  DOI: 10.1088/1674-1056/17/6/004