1. Aden A (2008) Biochemical production of ethanol from corn stover: 2007 state of technology model. NREL/TP-510-43205, May 2008. http://www.nrel.gov/docs/fy08osti/43205.pdf
2. Aden A, Ruth M, Ibsen KN, Jechura J, Neeves K, Sheehan J, Wallace R (2002) Lignocellulosic biomass to ethanol process design and economics utilizing co-current dilute acid prehydrolysis and enzymatic hydrolysis for corn stover. NREL report TP-510-32438, June 2002. http://www.nrel.gov/docs/fy02osti/32438.pdf
3. Badger Engineers, Inc. Cambridge, MA (1987) Economic feasibility of an acid-hydrolysis-based ethanol plant. Subcontract Report SERI-STR-231-3142, Prepared under subcontract No ZX-3-03096-2, April 1987
4. Biomass Multi-year Program Plan (MYPP) (2008) Office of the biomass program, energy efficiency and renewable energy. US Department of Energy, March 2008. http://www1.eere.energy.gov/biomass/pdfs/biomass_program_mypp.pdf
5. Bull SR (1987) Comparative energetics and economics of alternative pathways for fuel production. Solar Energy Research Institute (SERI), Energy from Biomass and Wastes X, Institute of Gas Technology (IGT), pp 1183–1192, January 1987