1. 1) E. Fitzer and R. Gadow: Am. Ceram. Soc. Bull., 65 (1986), 326.
2. 2) P. J. Lamicq, G. A. Bernhart, M. M. Dauchier and J. G. Mace: ibid., 65 (1986), 336.
3. 3) A. J. Caputo, D. P. Stinton, R. A. Lowden and T. M. Besmann: ibid., 66 (1994), 34.
4. 4) Kiyohito Okamura: The Japan Society for Composite Materials, 20 (1994), 34.
5. 5) T. Ishikawa, T. Yamamura, T. Hirokawa, K. Nakazawa, Y. Hayashi and N. Watanabe: Proceedings of The Japan Society for Composite Materials in 1993, The Japan Society for Composite Materials, Tokyo, (1993), p. 19.