1. Annual Report of Japanese Ceramic Industry 2004 (2005) Ceram Japan 40:710 (in Japanese)
2. Kitatsuji M, Soga Y, Umemoto M, Ueno H, Saito J (2003) J JSIDRE 71(8):751
3. Francis AA (2004) J Eur Ceram Soc 24:2819
4. Schuur HML (2000) J Mater Civil Eng 12(4):282
5. Ida T, Nakao N, Tanaka T (2003) R&D Kobe Steel Eng Rep 53(1):111 (in Japanese)