1. V. L. Klimenko, Tsvetn. Metall., No. 9, 34 (1984).
2. C. M. Abreu, M. Izquierdo, M. Keddam, et al., Electrochim. Acta 41, 2405 (1996).
3. V. V. Vysotskii and V. I. Roldugin, Colloid. J. 60, 673 (1998).
4. B. I. Shklovskii and A. L. Efros, Sov. Phys. Usp. 117, 845 (1974).
5. S. Kirkpatrick, in Theory and Properties of Disordered Materials (Mir, Moscow, 1977) [in Russian].