1. K. B. Oldham, J. Spanier, The fractional calculus, New York: Academic Press, 1974.
2. S. G. Samko, A. A. Kilbas, O. I. Marichev, Fractional integrals and derivatives: Theory and applications, Amsterdam: Gordon and Breach Science, 1993.
3. I. Podlubny, Fractional differential equations, New York: Academic Press, 1999.
4. A. A. Kilbas, H. M. Srivastava, J. J. Trujillo, Theory and applications of fractional differential equations, Amsterdam: Elsevier, 2006.
5. Y. G. Sinai, The limiting behavior of a one-dimensional random walk in a random medium, Theor. Probab. Appl., 27 (1983), 256–268. https://doi.org/10.1007/978-1-4419-6205-8