Lie symmetry and conserved quantity of a system of first-order differential equations

许学军, 梅凤翔, 张永发

Xu Xue-Jun (许学军), Mei Feng-Xiang (梅凤翔), Zhang Yong-Fa (张永发)

中国物理B . 2006, (1): 19 -21 . DOI: 10.1088/1009-1963/15/1/004