Biazar, Jafar, and Zainab Ayati. “G’/G-Expansion/Method/for/Related/Equations/to/the/Zhiber–Shabat/Equation”. Global Journal of Mathematical Analysis, vol. 1, no. 3, July 2013, pp. 97-103, https://doi.org/10.14419/gjma.v1i3.1090.