1. 2) Namiki N., Pharmaceuticals Monthly, 47, 1969-1977 (2005).
2. 3) Kearney P., Yarwood R. J., Pharm Tech Jpn., 9, 713-719 (1993).
3. 5) Mizumoto T., Masuda Y., Fukui M., Ohmura T., The collected papers of the 15th Symposium on Particulate Preparations and Design, October 1998, pp. 165-167.
4. 6) Makino T., Yamada M., Kikuta J., JP Patent Appl., 5-271054 (1993).
5. 7) Takara M., Matsunaga K., Shimizu T., JP Patent Appl., 8-291051 (1996).