1. A. M. Kurochkina and R. S. Rubinovich, Zh. Prikl. Spektrosk.,22, No. 5, 802 (1975).
2. P. W. J. M. Boumans, Theory of Spectrochemical Excitation, London (1966).
3. Spectral Analysis of Pure Substances [in Russian], Khimiya, Leningrad (1971).
4. V. M. Gol'dfarb and E. V. Il'ina, in: Applied Spectroscopy [in Russian], Vol. 1, Nauka, Moscow (1969), p. 172.
5. I. A. Krinberg, Izv. Sibirsk. Otd. Akad. Nauk SSSR, Ser. Khim. Nauk, 4, No. 9, 91 (1967).