1. A. V. Vedyaev, Usp. Fiz. Nauk 172(12), 1458 (2002) [Phys. Usp. 45 (12), 1296 (2002)].
2. A. S. Borukhovich, The Physics of Materials and Structures in Superconducting and Semiconducting Spin Electronics (Ural Division, Russian Academy of Sciences, Yekaterinburg, 2004) p. 175 [in Russian].
3. S. Das Sarma, J. Fabian, and I. Žutic, J. Supercond. 16, 697 (2003).
4. N. F. Mott, Metal-Insulator Transitions (Taylor, London, 1974; Nauka, Moscow, 1979).
5. N. Mott and E. Davis, Electronic Processes in Non-Crystalline Materials (Oxford University Press, Oxford, 1971; Mir, Moscow, 1982).