1. S. PROCHAZKA, in “dSpecial Ceramics 6”, edited by P. POPPER (British Ceramic Research Association, Stoke-on-Trent, 1975) p. 171.
2. S. PROCHAZKA and R. M. SCANLAN, J. Amer. Ceram. Soc.
58 (1975) 72.
3. Y. MURATA and R. H. SMOAK, in Proceedings of the International Symposium Factors in Densification and Sintering of Oxide and Non-oxide Ceramics, Hakone, Japan, 1978, edited by S. SOMIYA and S. SAITO (Gakujustu Bunken Fukyu-Kai, Tokyo, 1979) p. 382.
4. H. TANAKA and Y. INOMATA, J. Mater. Sci. Lett.
4 (1985) 315.
5. H. TANAKA, Y. INOMATA, H. TSUKUDA and A. HAGIMURA, Yogyo-Kyokai-Shi
92 (1984) 461.