1. Bonch-Bruyevich V. L., The Electronic Theory of Heavily Doped Semiconductors, American Elsevier, New York 1966.
2. Dale Kleppinger D., Lindholm F. A., Solid State Electronics14 (1971), 199.
3. Lukovsky G., Proc. Int. Conf. on Radiative Recombination in Semiconductors, ed. B. Lax et al., McGraw-Hill, New York 1966, p. 467.
4. Kane E. O., Phys. Rev.131 (1963), 79.
5. Chakravarti A. N., Swaminathan S., Czech. J. Phys. B25 (1975), 712.