1. V. M. Muchnik, Thunderstorm Physics (Gidrometeoizdat, Leningrad, 1974) [in Russian].
2. I. M. Imyanitov, Electrification of Aircraft in Clouds and Precipitation (Gidrometeoizdat, Leningrad, 1970) [in Russian].
3. V. V. Uchaikin, Method of Fractional Derivatives (Artishok, Ulyanovsk, 2008) [in Russian].
4. S. G. Samko, A. A. Kilbas, and O. I. Marichev, Fractional Integrals and Derivatives. Theory and Applications (Nauka i Tekhnika, Minsk, 1987; Gordon & Breach, London, 1993)
5. A. V. Pskhu, Fractional Partial Differential Equations (Nauka, Moscow, 2005) [in Russian].