[3] Yu Jinqian, Liu Xiqiang, Wang Tingting. Exact solutions and conservation laws of (2+1)-dimensional Boiti-Leon-Pempinelli equation[J]. Appl. Math. Comput., 2010, 216: 2293-2300.

[4] Wang Hong, Tian Yinghui. Non-Lie symmetry groups and new exact solutions of a (2+1)-dimensional generalized Broer Kaup system[J]. Commun. Nonlinear Sci. Numer. Simul., 2011, 16: 3933-3940.

[5] Ma Hongcai, Deng Aiping, Wang Yan. Exact solution of a KdV equation with variable coefficients[J]. Appl. Math. Comput., 2011, 61: 2278-2280.

[6] Tian Yinghui, Chen Hanlin, Liu Xiqiang. A simple direct method to find equivalence transformations of a generalized nonlinear Schrdinger equation and a generalized KdV equation[J]. Appl. Math. Comput., 2010, 215: 3509-3514.

[7] Feng Dahe. Exact solutions of Kuramoto-Sivashinsky equation[J]. Education and Management Engineering, 2012, 6: 61-66.

[9] Lou Senyue, Ma Hongcai. Non-Lie symmetry groups of (2+1)-dimensional nonlinear systems obtained from a simple direct method[J]. J. Phys. A: Math. Gen., 2005, 38: L129-L137.