1. Functionally gradient materials. In pursuit of super heat resisting materials for spacecraft.
2. Functionally Gradient Materials;Hirai;Ceram. Trans.,1993
3. R. Watanabe, A. Kawasaki, in: Proceedings of the Second Pacific Rim International Conference on Advances in Materials and Processing, Kyongju, Korea, 18–22 June 1995, The Korean Institute of Metals and Materials, Seoul, 1995, p. 1705.
4. T. Hirano, J. Teraki, T. Yamada, in: Proceedings of the First International Symposium on FGM, Sendai Japan, 8–9 October 1990, Functionally Gradient Materials Forum, Tokyo, 1990, p. 5.
5. L.M. Zhang, R. Tu, R.Z. Yuan, in: Proceedings of the Third International Symposium on Structure and FGM, Lausanne, Switzerland, 10–12 October 1994, Press Polytechniques et Universitaires Romandes, Lausanne, 1995, p. 273.