Symmetry and conserved quantities of discrete generalized Birkhoffian system
张克军, 方建会, 李燕
Symmetry and conserved quantities of discrete generalized Birkhoffian system
Zhang Ke-Jun(张克军), Fang Jian-Hui(方建会), and Li Yan(李燕)
中国物理B . 2010, (12): 124601 -124601 .  DOI: 10.1088/1674-1056/19/12/124601