1. G. Tempea, A. Roppe, A. Mueller, et al., in Technical Program of the International Conference LO’10, St. Petersburg, 2000, p. 40.
2. M. V. Korolkov, Y. Manz, and G. K. Paramonov, Chem. Phys. 217, 341 (1997).
3. D. K. Skripov and V. A. Trofimov, Proc. SPIE 4002, 34 (2000).
4. D. K. Skripov and V. A. Trofimov, in Fiber-Optic Technologies, Materials and Devices: Collection of Works of the Educational and Scientific Center of Fiber-Optic Materials and Devices (UNTs Volokonno-Optich. Mater. i Ustroistv, Moscow, 2000), No. 3, pp. 83–92.
5. S. M. Gladkov and N. I. Koroteev, Usp. Fiz. Nauk 160(7), 105 (1990) [Sov. Phys. Usp. 33, 554 (1990)].