1. Fractional derivatives and Cauchy problem for differential equations of fractional order;Dzhrbashyan;Izv. AN Arm. SSR. Mat.,1968
2. Samko, S.G., Kilbas, A.A., and Marichev, O.I. (1993). Fractional Integrals and Derivatives. Theory and Applications, Gordon and Breach Science Publishers.
3. Podlubny, I. (1999). Fractional Differential Equations, Academic.
4. Pskhu, A.V. (2005). Partial Differential Equations of Fractional Order, Nauka. (In Russian).
5. Kilbas, A.A., Srivastava, H.M., and Trujillo, J.J. (2006). Theory and Applications of Fractional Differential Equations, Elsevier Science Publishing.