1. 1) Kishi, H., Yoshioka, M.,Yamanoi, A. & Shiraishi, N. :Mokuzai Gakkaishi, 34-2(1988),133-139.
2. 2) Takase, S. & Shiraishi, N. :J. Appl. Polym. Sci., 37(1989),645-659.
3. 3) Shiraishi, N. :Polymer Applications, 38-7(1989),338-344.
4. 4) Kennedy, J. F., Phillips, G. O. & Williams, P. A. :Wood Processing and Utilization,(1989),243-249, Ellis Horwood.
5. 5) Han, G. -S., Ichinose, H., Takase, S. & Shiraishi, N. :Mokuzai Gakkaishi, 35-12(1989),1100-1104.