1. Kruglyashov, S.B., Cand. Sci. (Phys.-Math.) Dissertaion, Krasnoyarsk: SibGTU, 1996.
2. Nasluzova, O.I., Vinogradova, I.S., Zhidkov, L.L., and Lundin, A.G., Kristallografiya, 1988, no. 33, p. 1174.
3. Lundin, A.G., Moskvich, Yu.N., and Sukhovskii, A.A., Pis’ma Zh. Eksp.Teor. Fiz., 1978, vol. 27, no. 11, p. 623.
4. Sukhovskii, A.A., Kriger, A.I., Moskvich, Yu.N., and Lundin, A.G., Fiz. Tverd. Tela, 1980, vol. 22, no. 3, p. 914.
5. Nasluzova, O.I., Vinogradova, I.S., Lundin, A.G., and Zhidkov, L.L., Solid State Scien., 2004, vol. 6, no. 12, p. 1381.