First integrals and stability of second-order differential equations
许学军, 梅凤翔
First integrals and stability of second-order differential equations
Xu Xue-Jun (许学军), Mei Feng-Xiang (梅凤翔)
中国物理B . 2006, (6): 1134 -1136 .  DOI: 10.1088/1009-1963/15/6/002