Perturbation to Lie symmetry and another type of Hojman adiabatic invariants for Birkhoffian systems

丁宁, 方建会, 陈相霞

Ding Ning(丁宁), Fang Jian-Hui(方建会), and Chen Xiang-Xia(陈相霞)

中国物理B . 2008, (6): 1967 -1971 . DOI: 10.1088/1674-1056/17/6/006