1. I. K. Fedchenko, N. I. Fal'kovskii, and Yu. K. Bobrov, Izv. Vuz. Énergetika, No. 9, 31 (1968).
2. K. H. Höcker, W. Kluge, and H. Schrade, Ann. Phys.,11, 175 (1963).
3. H. R. Griem, Plasma Spectroscopy, McGraw-Hill, New York (1964).
4. R. V. Larents, Optical Plasma Pyrometry, Collection, N. N. Sobolev (editor) [Russian translation], IL (1960).
5. V. A. Bondar and L. I. Kiselevskii, Teplofiz. Vys. Temp.,5, 949 (1967).