[1] Zheng Bin. New soliton solutions to (2+1)-dimensional breaking soliton equation
[J].Chinese Journal of Quantum Electromics(量子电子学报),2006,23:451-455(in Chinese). 

[2] Liu Xi-Qiang. New explicit solutions of the (2+1)-dimensional Broer-Kaup equations
[J]. J.Partial Diff. Eqs,2004,17:1-9. 

[3] Tian Gui-Chen, Liu Xi-Qiang. Exact solutions of the general variable coefficient KdV equation with external force term
[J].Chinese Journal of Quantum Electromics(量子电子学报),2005,22:339-343.(in Chinese) 

[4] Fan Engui, Zhang Jian. Applications of the Jacobi elliptic function method to special-type nonlinear eqations
[J]. Phys.Lett. A,2002,305:383-392. 

[5] Dong Zhong-Zhou, Yu Xi-Chang, Wang Ling. Exact travelling wave solutions of the nonlinear coupled KdV equations
[J].Chinese Journal of Quantum Electromics(量子电子学报),2006,23:31-34.(in Chinese) 

[6] Liu Xi-Qiang,Jiang Song.The sechq-tanq-method and its application.Physics Letters A,2002,298:253-258. 

[7] Li Fuzhi, Liu Xiqiang, Symmetry reduction and invariable solutions of the Jimbo-Miwa equation
[J].Chinese Journal of Quantum Electromics(量子电子学报),2008.25:155-160. 

[8] Yan Zhilian, Liu Xiqiang. Symmetry reduction and explicit solutions for a generalized Zakharov-Kuznetsov equation
[J] Commun. Theor. Phys.,2006,45:29-32. 

[9] Tang Yaning, Xu Wei, Shen Jianwei,Solitary Wave Solution to Gardner Equation. Chinese Journal of Engineering Mathematics.2007,24(1):119-127.

[10] Fu Zuntao,Liu Shida,Liu Shikuo. New kinds of solutions to Gardner equation. Chaos, Solitons and Fractals 20 (2004) 301–309 

[11] Abdul-Majid Wazwaz. New solitons and kink solutions for the Gardner equation. Communications in Nonlinear Science and Numerical Simulation. 12 (2007) 1395–1404. 

[12] Chen Yong,Yan Zhenya. New exact solutions of (2 + 1)-dimensional Gardner equation via the new sine-Gordon equation expansion method. Chaos,Solitons and Fractals 26 (2005) 399-406. 

[13] Tian Chou. Applications of Lie group method to Partial differential equation(李群及其在微分方程中的应用)
[M]. Beijing: Science and Technology press, 2001,248-268. 

[14] Liu Shi-Kuo, Liu Shi-Da. Nonlinear equations of physics(物理学中的非线性方程)
[M]. Beijing: Beijing University Press, 2000,32-53.