1. C. Hayashi, R. Ueda and A. Tasaki (eds.), ?Choubiryushi (Ultrafine Particles)? (Mita Shuppankai, Tokyo, 1988).
2. S. Saito (ed.), ?Choubiryushi Handobukku (Handbook of Ultrafine Particles)? (Fuji Tekunoshisutemu, Tokyo, 1990).
3. C. Herring, J. Appl. Phys. 21 (1950) 31.
4. D. L. Johnson and I. B. Cutler, J. Amer. Ceram. Soc. 46 (1963) 541, and references therein.
5. S. Iwama, and K. Hayakawa, Jpn J. Appl. Phys. 20 (1981) 335.