1. Ghose, D. and Hippler, R., Ionoluminescence. Luminescence of Solids, Vij, D.R., Ed., New York: Plenum, 1998, p. 189.
2. Abroyan, I.A., Eremeev, M.A., and Petrov, N.N., Usp. Fiz. Nauk, 1967, vol. 92, p. 105.
3. Gorbachev, A.F., Styrov, V.V., Tolmachev, V.M., and Tyurin, Yu.I., Zh. Eksp. Teor. Fiz., 1986, vol. 91, no. 1, p. 172 [Sov. Phys. JETP (Engl. Transl.), vol. 64, no. 1, p. 99].
4. Styrov, V.V., Pis’ma Zh. Eksp. Teor. Fiz., 1972, vol. 15, no. 5, p. 242 [JETP Lett. (Engl. Transl.), vol. 15, no. 5, p. 168].
5. Grankin, V.P., Shalamov, V.Yu., and Uzunoglu, N.K., Chem. Phys. Lett., 2000, vol. 328, p. 10.