1. W. R. LACEFIELD, in ?Bioceramics: material characteristics versus in vivo behavior?, edited by P. DUCHEYNE and J. LEMONS (The New York Academy of Science, New York, 1988) p. 72.
2. K. TAKATSUKA, T. YAMAMURO, T. KITSUGI, T. NAKAMURU, T. SHIBUYA and T. GOTO, J. Appl. Biomater. 4 (1993) 317.
3. S. COOK, S. SALKELD, D. GAISSER and W. WAGNER, J. Oral Implant. 290 (1993) 288.
4. M. MORELAND and D. MOORE, Ceram. Bull. 67 (1988) 1045.
5. A. CAPPJr., in ?Engineered materials handbook?, Vol. 4, edited by S. SCHEEODER (ASM International, USA, 1991) p. 367.