1. L. B. Borovinskaya, V. P. Samsonova, and L. M. Plohih, “Relationship between Electrical Resistivity and Soil Water Content,” Nauchn. Dokl. Vyssh. Shk., Biol. Nauki, No. 3, 23–30 (1981).
2. A. D. Voronin, The Bases of Soil Physics (Mosk. Gos. Univ., Moscow, 1986) [in Russian].
3. S. V. Nerpin and A. F. Chudnovskii, Physics of the Soil (Nauka, Moscow, 1970) [in Russian].
4. A. I. Pozdnyakov, L. A. Pozdnyakova, and A. D. Pozdnyakova, Stationary Electrical Fields in Soils (Moscow, 1996) [in Russian].
5. A. W. Adamson, Physical Chemistry of Surfaces, 2nd ed. (Interscience, New York, 1967), p. 126.