“…In [11], Clément et al proved the existence of Hölder continuous solutions for a partial fractional differential equation and in [18], Kilbas et al studied the existence of solutions of several classes of ordinary fractional differential equations. Also, Samko et al [35], Anguraj et al [4], Baleanu and Mustafa [9], Diethelm and Ford [15], Kilbas and Marzan [17], Kosmatov [21], Tian and Bai [39], Wei et al [40], Aghajani et al [3], Pilipović and Stojanović [30], Yuste and Acedo [41], Idczak and Kamocki [16], and Kostić [22], between so many more, have investigated the existence of solutions for various types of fractional differential and integral equations. Furthermore, several analytical and numerical methods have been proposed for approximate solutions of fractional differential equations, e.g.…”