1. Abrosimova, G.E., Aronin, A.S., Kabanov, Yu.P., et al., Fiz. Tverd. Tela, 2004, vol. 8, no. 12, p. 2158.
2. Krainova, G.S., Nevmerzhitsky, V.I., Frolov, A.M., Pisarenko, T.A., and Yudin, V.V., Bull. Russ. Acad. Sci. Phys., 2010, vol. 74, no. 5, p. 714.
3. Slutsker, A.I., Betekhtin, V.I., Kadomtsev, A.G., et al., Fiz. Tverd. Tela, 2008, vol. 50, no. 2, p. 280.
4. Maričić, A., Minić, D.M., and Zak, T., Sci. Sintering, 2004, no. 36, p. 197.
5. Malinovskii, V.K., Fiz. Tverd. Tela, 1999, vol. 41, no. 5, p. 805.