Li, De Sheng; Zhang, Hong Qing Improved tanh-function method and the new exact solutions for the general variable-coefficient KdV equation and MKdV equation. (Chinese. English summary) Zbl 1202.81044 Acta Phys. Sin. 52, No. 7, 1569-1573 (2003). Cited in 3 Documents MSC: 81Q05 Closed and approximate solutions to the Schrödinger, Dirac, Klein-Gordon and other equations of quantum mechanics 35Q53 KdV equations (Korteweg-de Vries equations) 35Q51 Soliton equations PDFBibTeX XMLCite \textit{D. S. Li} and \textit{H. Q. Zhang}, Acta Phys. Sin. 52, No. 7, 1569--1573 (2003; Zbl 1202.81044)