1. 1) Japan Society for the Promotion of Science 124th Committee on Advanced Ceramics (Ed.): Senshin Seramikkusu no Tsukurikata to Tsukaikata, (2005) 192-205.
2. 2) H. G. Merkus: Particle size measurements Fundamentals, Practice, Quality, (2009) 259-284
3. 3) T. Matsumoto: Koroido Kagaku notameno Reoroji, (2003) 10-12.
4. 4) M. Rhodes: Introduction to Particle Technology 2nd edition, (2008) 57-61.
5. 5) S. Takeda: J. Soc. Powder Technol., Japan, 49 (2012) 448-456.