1. (a) C.J. Brinkman, D.E. Clark, D.R. Ulrich, (Eds.), Better ceramics through chemistry. Materials Research Society Symposia Proceedings 32 (1984); (b) S. Sakka, Am. Ceram. Soc. Bull., 64 (11) (1985) 1463, (c) D.W. Johnson, Jr. Am. Ceram. Soc. Bull; 64 (12) (1985) 1597.
2. T. Woignier, J. Phalippou, in: Proceedings of the First International Workshopon Non-Crystalline Solids, M.D. Baro, N.L. Clavaguera, (Eds.), World Scientific, Singapore, 1986, p. 415.
3. J. Bouaziz, T. Woignier, D. Bourret, R. Sempere, J. Non-Cryst. Solids 82 (1986) 225.
4. M.E. Nordberg, J. Am. Ceram. Soc. 27 (1944) 299.
5. D. Hoffman, R. Roy, S. Komarneni, Mater. Lett.2 (1984) 245.