A series of non-Noether conservative quantities and Mei symmetries of nonconservative systems
刘鸿基, 傅景礼, 唐贻发
A series of non-Noether conservative quantities and Mei symmetries of nonconservative systems
Liu Hong-Ji(刘鸿基), Fu Jing-Li(傅景礼), and Tang Yi-Fa(唐贻发)
中国物理B . 2007, (3): 599 -604 .  DOI: 10.1088/1009-1963/16/3/007