1) Katz, R. N., ``Nitrogen Ceramics 1976-1981,'' Progress in Nitrogen Ceramics, Ed. by Riley, F. L., Martinus Nijhoff Publishers, The Hague, The Netherlands (1983) pp. 3-20.
2) Jack, K. H., ``Sialons: A Study in Materials Development, Non-Oxide Technical and Engineering Ceramics,'' Ed. by Hampsshire, S., Elsevier Applied Science Publishers, New York (1986) pp. 1-30.
3) Hoffmann, M. J. and Petzow, G., ``Microstructure Design of Si3N4 Based Ceramics, Silicon Nitride Ceramics,'' Ed. by Chen, I. W., Becher, P. F., Mitomo, M., Petzow, G. and Yen, T. S., Material Research Society, Pittsburgh, PA (1993) pp. 3-14.
4) Arakawa, K., Sugiyama, M., Shimazaki, R., Ito, S. and Ishikawa, K., Proceedings of 3rd International Symposium on Ceram. Mater. and Components for Engines, Ed. by Tennery, V. J., American Ceramic Society (1988) pp. 1407-1418.