1. Global biomass fuel resources
2. Kaltschmitt M., Dinkelbach L., Biomass Gasification and Pyrolysis—State of the Art and Future Prospects, , Kaltschmitt M., Bridgwater A. V., Eds. (CPL Scientific, Newbury, UK, 1997).
3. Perlack R. D., et al., Biomass as Feedstock for a Bioenergy and Bioproducts Industry: The Technical Feasibility of a Billion-Ton Annual Supply (U.S. Department of Energy and U.S. Department of Agriculture, April, 2005)(; available at feedstockreview.ornl.gov/pdf/billion_ton_vision.pdf).