1. Alad, M., Eiala, M., Ouchi, K. et al., Trans. 9th Int. Biomat. Symp. & 3rd Meeting Am. Biomat. Soc., Vol. Ill, Clemson, University, SC, USA.
2. ACS Symp.,1976
3. Aoki, H., Kato, K., and Tabata, T. (1977) Rep. Inst. Med. Dent. Eng. Japan, 11, 33.
4. Athenstaedt, H. (1974) Pyroelectric and piezoelectric properties of vertebrates, Ann. N. Y. Ac. Sci, 238, 68.
5. Azzoni, C. B., Del Nero, G. L., Krajewski, A., and Ravaglioli, A. (1980) J. Mat. Sc., 15, 646.