1. U.S. Environmental Protection Agency, Light-Duty Automotive Technology and Fuel Economy Trends 1975–2001, 2001.
2. Northeast Advanced Vehicle Consortium (under contract to Defense Advanced Research Projects Agency), Interviews with 44 Global Experts on the Future of Transportation and Fuel Cell Infrastructure and a Fuel Cell Primer, Agreement No. NAVC1099–PG030044, 2000.
3. General Motors, Argonne National Laboratory, BPAmoco, Exxon Mobile, and Shell, Well-to-Wheels Energy use and Greenhouse Gas Emissions of Advanced Fuel/Vehicle Systems, 2001.
4. CA Energy Commission and the Air Resource Board, A Fuel Cycle Energy Conversion Efficiency Analysis, 2000.
5. CA Energy Commission and the Air Resource Board, A Fuel Cycle Energy Conversion Efficiency Analysis, 2000.