1. L. S. Berman, Capacitance Methods for Studying Semiconductors (Nauka, Leningrad, 1972) [in Russian].
2. A. A. Lebedev, A. A. Lebedev, and D. V. Davydov, Semiconductors 34, 115 (2000).
3. S. M. Sze and K. N. Kwok, Physics of Semiconductor Devices (Wiley, New York, 2007).
4. B. L. Sharma and R. K. Purohit, Semiconductor Heterojunctions (Pergamon Press, Oxford, 1974; Sov. Radio, Moscow, 1979).
5. A. G. Milnes and D. L. Feucht, Heterojunctions and Metal-Semiconductor Junctions (Academic Press, New York, 1972; Mir, Moscow, 1975).