Zayed, Elsayed M.E., et al. “THE FRACTIONAL \((D_ξ^{α}G G)\)-EXPANSION METHOD AND ITS APPLICATIONS FOR SOLVING FOUR NONLINEAR SPACE-TIME FRACTIONAL PDES IN MATHEMATICAL PHYSICS”. Italian Journal of Pure and Applied Mathematics, vol. 34, June 2015, pp. 463-82, https://journals.uniurb.it/index.php/ijpam/article/view/6320.