1. M. Yoshizumi,Bull. Ceram. Soc. Jpn 4 (1986) 318.
2. L. Gordon, M. L. Salutsky andH. H. Willard, ?Precipitation from Homogeneous Solution? (Wiley, New York, 1959) p. 1.
3. I. Kayama,Catalyst 16 (1974) 18.
4. H. Suzuki, T. Iwai, T. Hasegawa andI. Kayama J. Chem. Soc. Jpn (dy1977) 1063.
5. K. Fujita, K. Matsuda andI. Kayama,J. Ceram. Soc. Jpn 83 (1975) 586.