1. W. Kohn and J.M. Luttinger, Phys. Rev., 98, pp. 883–888 (1955).
2. S. T. Pantelides, Solid State Comm., 14, pp. 1255–1258 (1974).
3. D.V. Lang, Topics in Applied Physics: Thermally Stimulated Relaxation in Solids, P. Braunlich, ed., 37, Springer, Berlin, pp. 93–133 (1979).
4. D.K. Schroder, Semiconductor Material and Device Characterization, Wiley-Interscience, John Wiley and sons, New York, pp. 297–358 (1990).
5. CT. Sah, Solid State Electronics, 19, 975 (1976).