1. 1) http://www.climatevision.gov/sectors/electricpower/pdfs/bioenergy_vision.pdf#search='Vision%20for%20bioenergy%20&%20biobased%20products'
2. 3) http://www1.eere.energy.gov/biomass/pdfs/35523.pdf
3. 5) S. Kleff : http://www.mbi.org/simpresnew.pdf
4. 6) Lee, P. C., Lee S. Y., Hong, S. H., Chang, H. N., Park, S. C. : Biotechnol. Lett. 25 (2) , 111-114 (2003).
5. 7) Guettler, M. V., Jain, M. K., Rumler, D. : U.S. Patent 5,573,931 (1996) .