1. V. A. Kiselev, B. V. Novikov, and A. E. Cherednichenko, Exciton Spectroscopy of the Surface Layers of Semiconductors (SPb. Univ., St.-Petersburg, 2003) [in Russian].
2. V. V. Kolosov, Extended Abstract of Candidate’s Dissertation (Leningrad, 1978); R. G. Damburg, and V. V. Kolosov, J. Phys. B 9, 3358 (1976).
3. N. N. Akhmediev, Sov. Phys. JETP 52, 773 (1980).
4. S. A. Vaganov and R. P. Seisyan, Tech. Phys. Lett. 39, 121 (2012).
5. R. P. Seisyan, M. A. Abdullaev, and B. P. Zakharchenya, Sov. Phys. Semicond. 7, 1431 (1973).