A generalized Mei conserved quantity and Mei symmetry of Birkhoff system
王鹏, 方建会, 王先明
A generalized Mei conserved quantity and Mei symmetry of Birkhoff system
Wang Peng(王鹏), Fang Jian-Hui(方建会), and Wang Xian-Ming(王先明)
中国物理B . 2009, (4): 1312 -1315 .  DOI: 10.1088/1674-1056/18/4/003