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2. The Roadmap for Biomass Technologies in the U.S., Biomass R&D Technical Advisory Committee, US Department of Energy, Accession No. ADA 436527, 2002.
3. R. D. Perlack, L. L. Wright, A. Turhollow, R. L. Graham, B. Stokes, D. C. Erbach, Biomass as Feedstock for a Bioenergy and Bioproducts Industry: The Technical Feasibility of a Billion-Ton Annual Supply, Report No. DOE/GO-102995-2135;
4. Oak Ridge National Laboratory, Oak Ridge, TN, 2005. Available electronically at http://www.osti.gov/bridge.