1. Lignocellulose conversion: an introduction to chemistry, process and economics, in Catalysis for Renewables, ed by and . Wiley-VCH, Weinheim (2007).
2. US Department of energy, Energy Information Administration, International Energy Outlook 2006,http://www.eia.doe.gov
3. Biomass for Renewable Energy, Fuels and Chemicals, Academic Press, London (1998).
4. Ethanol Can Contribute to Energy and Environmental Goals
5. Ethanol's Energy Return on Investment: A Survey of the Literature 1990−Present