1. V. V. Sobolev and V. V. Nemoshkalenko, Computational Physics Methods in Solid-State Theory. Electronic Structure of Semiconductors [in Russian], Naukova Dumka, Kiev (1988).
2. V. V. Sobolev, Optical Properties and Electronic Structure of Nonmetals. I. Introduction to Theory [in Russian], Inst. Komp. Issled., Moscow–Izhevsk (2012).
3. C. F. Klingshrin, Semiconductor Optics, Springer, Berlin (1985).
4. A. N. Tikhonov and V. Ya. Arsenin, Methods for Solving Incorrect Problems [in Russian], Nauka, Moscow (1986).
5. V. V. Sobolev, Optical Properties and Electronic Structure of Nonmetals. II. Simulation of Integral Spectra by Elementary Bands [in Russian], Inst. Komp. Issled., Moscow–Izhevsk (2012).