1. A. Kilbas, H. Srivastava, and J.J. Trujillo, Theory and applications of fractional differential equations., Vol. 204 (North-Holland Mathematics Studies, Elsevier, Amersterdam., 2006).
2. I. Podlubny, Fractional differential equations. (Academic Press, New York., 1999).
3. S.G. Samko, A.A. Kilbas, and O.I. Marichev, Fractional integrals and derivatives. (Theory and Applications. Gordon and Breach Science Publishers, Switzerland., 1993).
4. L. Changpin and F. Zeng, Numerical methods for fractional calculus. (CRC Press, Taylor and Francis Group., 2015).
5. K.S. Miller and B. Ross, An introduction to the fractional calculus and fractional differential equations. (A Wiley-Interscience Publication Wiley, New York., 1993).