1. Sakka, S., in Treatise on Materials Science and Technology, Vol. 22, Glass III, edited by M. Tomozawa and R.H. Doremus (Academic Press, New York, 1982), p. 129.
2. Sakka, S. and Yoko, T., Ceramics International, 217 (1991).
3. Sakka, S. and Yoko, T., in Structure and Bonding 77, edited by R. Reisfeld and C.K. Jorgensen, (Springer-Verlag, Berlin, 1992), p. 89.
4. Yamamoto, Y., Kamiya, K., and Sakka, S., Ceram. J., Soc. Japan, 91, 328 (1982).
5. Brinker, C. J., and Scherer, G. W., Sol-Gel Science (Academic Press, San Diego, 1990), p. 787?837.