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2. Miller, K.S., Ross, B.: An Introduction to the Fractional Calculus and Fractional Differential Equations. Wiley, New York (1993)
3. Kilbas, A.A., Srivastava, H.M., Trujillo, J.J.: Theory and Applications of Fractional Differential Equations. Elsevier Science B.V, Amsterdam (2006)
4. Samko, S.G., Kilbas, A.A., Marichev, O.I.: Fractional Integral and Derivatives. Gordon and Breach Science Publishers, Yverdon (1993)
5. Miller, K.S.: Fractional differential equations. J. Fract. Calc. 3, 49–57 (1993)