Al-Amry, M. S., and E. F. Abdullah. 2019. “Exact Solutions for a New Models of Nonlinear Partial Differential Equations Using \((\frac {G^{’}}{G^{2}})\)-Expansion Method”. University of Aden Journal of Natural and Applied Sciences 23 (1):189-99. https://doi.org/10.47372/uajnas.2019.n1.a16.