1. Biocommodity Engineering
2. H. Shapouri, J.A. Duffield, M. Wang, The Energy Balance of Corn: An Update, No. 814, U.S. Department of Agriculture, Office of the Chief Economist, 2002. http://www.usda.gov/oce/oepnu/aer-814.pdf.
3. Biomass Research and Development Technical Advisory Committee, Roadmap for Biomass Technologies in the U.S., U.S. Government, 2002. http://www.bioproducts-bioenergy.gov/pdfs/Final Biomass Roadmap.pdf.
4. Biomass for Renewable Energy, Fuels and Chemicals;Klass,1998
5. Energy Information Administration, Annual Energy Outlook 2004, U.S. Department of Energy, DOE/EIA-0383, 2004. http://www.eia.doe.gov/oiaf/aeo/.