1. Adamchuk, Yu.V. and Totov, V.V., Electrical Processes and the Generation of Lightning in Volcanic Aerosol, Preprint of IAE-4016/1, 1984. 117 p.
2. Akbashev, R.R. and Firstov, P.P., The variation in the gradient of the Earth’s electrical potential during the passage of volcanic plumes, in Materialy XII Mezhdunarodnoi seismologicheskoi shkoly “Sovremennye metody obrabotki i interpretatsii seismologicheskikh dannykh (Proc. XII Intern. Seismological School "Modern Methods for the Processing and Intermretation of Seismological Data”), September 11–15, 2017, Obninsk: FITs EGS RAN, 2017, pp. 18–19.
3. Belousov, A.B. and Belousova, M.G., The 1964 eruption of Shiveluch (Kamchatka)—A Plinian eruption preceded by a voluminous slide of the cone top, Volcanology and Seismology, 1996, vol. 17, nos. 4/5, pp. 497–508.
4. Bliznetsov, V.E. and Senyukov, S.L., The ADAP program for automatic identification of ash emissions and for calculating their heights from seismological data, Seismicheskie Pribory, 2015, vol. 51, no. 1, pp. 46–59.
5. Chalmers, J.A. Atmospheric Electricity, New York: Pergamon Press, 1967.