Weak Noether symmetry for a nonholonomic controllable mechanical system
夏丽莉, 山灵芳
Weak Noether symmetry for a nonholonomic controllable mechanical system
Xia Li-Li(夏丽莉) and Shan Ling-Fang(山灵芳)
中国物理B . 2010, (9): 90302 -090302 .  DOI: 10.1088/1674-1056/19/9/090302