1. Ya. S. Bobovich, Usp. Fiz. Nauk,84, No. 1, 37 (1964).
2. V. A. Zubov, M. M. Sushchinskii, and I. K. Shuvalov, Usp. Fiz. Nauk,89, No. 1, 49 (1966).
3. J. Brandmuller and H. Moser, Introduction to Raman Spectroscopy, D. Steinkopff, Darmstadt. (1962).
4. N. I. Dvorovenko and A. V. Sechkarev, Izv. VUZ. Fiz., No. 4, 6 (1964).
5. A. V. Bobrov and Kh. E. Sterin, Opt. Spektrosk.,17, 532 (1964).