Perturbation to Mei symmetry and Mei adiabatic invariants for discrete generalized Birkhoffian system

张克军, 方建会, 李燕

Zhang Ke-Jun(张克军), Fang Jian-Hui(方建会), and Li Yan(李燕)

中国物理B . 2011, (5): 54501 -054501 . DOI: 10.1088/1674-1056/20/5/054501