[4] Zhu Jiamin, Zheng Chunlong, Ma Zhengyi. A general mapping approach and new travelling wave solutions to the general variable coefficient KdV equation [J]. Chinese Physics, 2004, 13(12): 2008-2012.
[7] Huang Lili, Chen Yong. Nonlocal symmetry and exact solutions of the (2+1)-dimensional modified Bogoyavlenskii-Schiff equation [J]. Chinese Physics, 2016, 25(6): 060201.
[8] Gao Yuan, Tang Xiaoyan. A coupled variable coefficient modified KdV equation arising from a two-layer fluid system [J]. Communication in Theoretical Physics, 2007, 48(6): 961-970.
[9] Yang Jianrong, Mao Jiejian. Complexiton solutions of a special coupled mKdV system [J]. Chinese Physics Letters, 2008, 25(5): 1527-1530.