A. G. Aronov and A. S. Ioselevich, in Excitons, edited by E. I. Rashba and M. D. Sturge, Elsevier, New York, 1982 [Russian original, Nauka, Moscow, 1985, p. 193].
R. J. Damburg and V. V. Kolosov, J. Phys. B 9, 3358 (1976).
A. B. Novikov, H. Roppischer, N. Stein, and B. V. Novikov, J. Appl. Phys. 78, 4011 (1995).
A. V. Sel'kin, Vest. St. Peter. Gos. Univer., Ser. 4, No. 2(11), 87 (1996).
V. A. Kiselev, B. V. Novikov, and A. E. Cherednichenko, Excitonic Spectroscopy of the Surface Region of a Semiconductor [in Russian], Leningrad State University Press, Leningrad, 1987.
D. E. Aspnes, in Handbook on Semiconductors, edited by T. S. Moss, North-Holland, New York, 1980, Vol. 2, p. 109.