1. E. L. Belokoneva, M. A. Simonov, B. V. Mill’, et al., Dokl. Akad. Nauk SSSR 255(5), 1099 (1980) [Sov. Phys. Dokl. 25, 954 (1980)].
2. A. A. Kaminskii, B. V. Mill’, and S. É. Sarkisov, Physics and Spectroscopy of Laser Crystals (Nauka, Moscow, 1986), p. 197 [in Russian].
3. Fomos Technology, Moscow, www.fomos-t.ru.
4. S. Q. Wang and S. Uda, J. Cryst. Growth 250, 463 (2003).
5. A. E. Blagov, G. D. Mansfeld, B. V. Mill, et al., Proc. of the IEEE Intern. Frequency Control Symp., Montreal, Canada (2004), p. 634.