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3. I. V. Avilova, L. M. Biberman, V. S. Vorob’ev, et al.,Optical Properties of Hot Air [in Russian], Moscow (1970).
4. G. A. Kobzev,Optical Properties of an Air Plasma at High Temperatures [in Russian], Preprint No. 1–112 of the Institute for High Temperatures of the USSR Academy of Sciences, Moscow (1983).
5. G. A. Kobzev and V. A. Nuzhnyi,Spectral and Integral Optical Characteristics of a Continuous Spectrum of an Air Plasma at High Temperatures [in Russian], Preprint No. 1–131 of the Institute for High Temperatures of the USSR Academy of Sciences, Moscow (1984).