1. T. T. Basiev, V. V. Osiko, A. M. Prokhorov, and E. M. Dianov, in Solid-State Mid-Infrared Laser Sources, Ed. by I. T. Sorokina and K. L. Vodopyanov, (Springer, New York, 2003), Vol. 89.
2. T. T. Basiev, M. N. Basieva, M. E. Doroshenko, et al., Laser Phys. Lett. 3, 17 (2006).
3. V. S. Butylkin, G. V. Venkin, V. P. Protasov, et al., Pis’ma Zh. Éksp. Teor. Fiz. 17, 400 (1973).
4. Y. R. Shen, The Principles of Nonlinear Optics (Wiley, New York, 1984; Nauka, Moscow, 1989).
5. T. T. Basiev, Usp. Fiz. Nauk 160, 1149 (1999).