1. R. Daisy and B. Fisher, J. Opt. Soc. Am. B 11, 1059 (1994).
2. B. Crosignany, M. Segev, D. Engin, et al., J. Opt. Soc. Am. B 10, 446 (1993).
3. V. N. Belyi and N. A. Khilo, Pis’ma Zh. Tekh. Fiz. 23(12), 31 (1997) [Tech. Phys. Lett. 23, 467 (1997)].
4. V. N. Belyi and N. A. Khilo, Pis’ma Zh. Tekh. Fiz. 20(18), 41 (1994) [Tech. Phys. Lett. 20, 740 (1994)].
5. B. B. Boiko and N. S. Petrov, Reflection of Light from Amplifying and Nonlinear Media (Nauka i Tekhnika, Minsk, 1988).