1. M. A. Lampert and P. Mark, Current Injections in Solids, Academic Press, New York (1970).
2. N. F. Mott and R. Henry, Electronic Processes in Ionic Crystals [Russian translation], Izd. Inostr. Lit., Moscow (1950).
3. Kao Kwan Shi and Huang Wei, Electron Transport in Solids. Part I [Russian translation], Mir, Moscow (1984).
4. D. L. White, J. Appl. Phys.,33, No. 8, 2547 (1962).
5. J. MacPhee, in: W. P. Mason (ed.), Physical Acoustics. Vol. 4A. Applications to Quantum & Solid State Physics, Academic Press, New York (1966).