1. W. Jiang and D. M. Roy, Am. Ceram. Soc. Bull. 71(4), 642 (1992).
2. P. Lu, Q. Li, and J. Zhai, J. Am. Ceram. Soc. 91(3), 955 (2008).
3. A. D. Chervonnyi and N. A. Chervonnaya, Proceedings of XIV Russian Workshop on Experimental Mineralogy, Chernogolovka (Russia), 2001 (Chernogolovka, 2001), p. 311 [in Russian].
4. A. D. Chervonnyi and N. A. Chervonnaya, Proceedings of VIII All-Russia Workshop on the High-Temperature Chemistry of Silicates and Oxides, St. Petersburg, 2002 (St. Petersburg, 2002), p. 219 [in Russian].
5. A. D. Chervonnyi and N. A. Chervonnaya, Proceedings of XVII Mendeleev Congress on General and Applied Chemistry, Vol. 3: Materials and Nanotechnologies (Kazan, 2003), p. 450 [in Russian].