1. 1) Ministry of Agriculture Forestry and Fisheries of Japan. Bio-fuel technology innovation scheme (draft). http://www.maff.go.jp/j/biomass/b_innovation/02/pdf/data4.pdf.
2. 2) Japan Alcohol Association ed. Bio-ethanol Production Technologies. Kougyo Chosakai Publishing, Inc. (2007) vol.109,
3. 3) ITO A. A Study on Milling Pretreatment for Ethyl Alcohol Production from Cellulosic Woody Biomass. Journal of the Mining and Materials Processing Institute of Japan. (2007) vol.123, no.8, p.413-418.
4. 4) FUKUSHIMA K. Secondary Xylem Formation Introduction to Biomass Science. Kaiseisha Press. (2003) p.18-19.
5. 5) ISOGAI A. Material Science of Cellulose. University of Tokyo Press. (2001) vol.20,