1. Avagimov, A.A. and Ataev, A.K., Structure of Precursor Anomalies of Electrical Conductivity Its Tensosensibility in Kopetdag Seismic Active Region, J. Earthq. Pred. Res., 1994, vol. 3, no. 4, pp. 572–580.
2. Avdualiev, A.K., Voitov, G.I., and Rudakov, V.P., Radon Precursors before Several Large Central Asia Earthquakes, Dokl. AN SSSR, 1986, vol. 291, no. 4, pp. 924–927.
3. Barsukov, O.M. and Sorokin, O.N., The Variation of Apparent Resistivity in the Garm Seismic Region, Fizika Zemli, 1973, no. 10, pp. 100–102.
4. Dobrovol’skii, I.P., Mekhanika podgotovki tektonicheskogo zemletryaseniya (The Mechanics of the Precursory Period of a Tectonic Earthquake), Moscow: IFZ AN SSSR, 1984.
5. Elektrorazvedka (Electrical Prospecting), Moscow: Nedra, 1989.