1. K. Oldham, J. Spanier, The Fractional Calculus, (Academic Press, New York, 1974)
2. I. Podlubny, Fractional Differential Equations, (Academic Press, New York, 1999)
3. R. Hilfer, Applications of Fractional Calculus in Physics, (World Scientific, Singapore, 2000)
4. S. G. Samko, A. A. Kilbas, O. I. Maritchev, Fractional Integrals and Derivatives, Theory and Applications, (Gordon and Breach Science Publishers, Langhorne, PA, 1993)
5. M. Caputo, F. Mainardi, Pure Appl. Geophys. 91, 8 (1971)