1. Math. Sc. Eng.;K.B. Oldham,1974
2. Samko, S.G., Kilbas, A.A., Marichev, O.I.: Fractional Integrals and Derivatives: Theory and Applications. Gordon and Beach, New York (2006)
3. Podulubny, I.: Fractional Differential Equations. Academic Press, San Diego (1999)
4. Kilbas, A.A., Srivastava, H.M., Trujillo, J.J.: Theory and Applications of Fractional Differential Equations. Elsevier, Amsterdam (2006)
5. Mandelbrot, B.B.: The Fractal Geometry of Nature. Freeman, New York (1983)