E. M. Zayed, Y. A. Amer, and R. M. Shohib, “THE FRACTIONAL \((D_ξ^{α}G/G)\)-EXPANSION METHOD AND ITS APPLICATIONS FOR SOLVING FOUR NONLINEAR SPACE-TIME FRACTIONAL PDES IN MATHEMATICAL PHYSICS”, IJPAM, vol. 34, pp. 463–482, Jun. 2015.