1. Ahlvik, P., Brandberg, A., 2001. Well-to-Wheel Efficiency: For Alternate Fuels from Natural Gas or Biomass. Ecotraffic R&D3 AB. A report for the Swedish National Road Administration.
2. European Council for Automotive R&D, 2004. Well-to-Wheels Analysis of Future Automotive Fuels and Powertrains in the European Context. Joint report by European Council for Automotive R&D (EUCAR), Conservation of Clean Air and Water in Europe (CONCAWE) and the Joint Research Council (JRC). Available from: .
3. Fleming, J., Habibi, S., MacLean, H.L., Brinkman, N., 2005. Evaluating the Sustainability of Producing Hydrogen from Biomass through Well-to-Wheel Analysis. Society of Automotive Engineers (SAE) Transactions. Technical Paper Series 2005 SAE World Congress. SAE 2005-01-1552.
4. General Motors Europe., 2002. GM Well-to-Wheel Analysis of Energy Use and Greenhouse Gas Emissions of Advanced Fuel/Vehicle Systems—A European Study. General Motors Corporation Report. Available from: .
5. General Motors North America., 2001. Well-to-Wheel Energy Use and Greenhouse Gas Emissions of Advanced Fuel/Vehicle Systems – North American Analysis. General Motors Corporation Report. http://greet.anl.gov/publications.html.