1. The Physics of Quantum Information, Ed. by D. Bouwmeester, A. Ekert, and A. Zeilinger (Springer, Berlin, 2000; Postmarket, Moscow, 2002).
2. V. P. Karassiov, J. Russ. Laser Res. 26, 484 (2005).
3. E. V. Moreva, G. A. Maslennikov, S. S. Straupe, and S. P. Kulik, Phys. Rev. Lett. 97, 023602 (2006).
4. A. V. Burlakov, S. P. Kulik, Yu. I. Rytikov, and M. V. Chekhova, Zh. Éksp. Teor. Fiz. 122, 738 (2002) [JETP 95, 639 (2002)].
5. V. P. Karassiov, J. Phys. A 26, 4345 (1993).