1. Timothy T. Maxwell and Jesse C. Jones, Alternative Fuels: Emissions, Economics and Performance (Warrendale, PA: Society of Automotive Engineers, 1995), pp. 29–42.
2. Robert Q. Riley, Alternative Cars in the 21st Century (Warrendale, PA: Society of Automotive Engineers, 1994), pp. 173–176.
3. Bundy International, “Fuel Supply Systems for a Healthier Environment”, ed. Michael Scarlett, Automotive Technology International ′94, pp. 37-40.
4. “Plastic Bounces Back in Fuel Tanks,” Automotive News (January 30, 1995).
5. Delphi VII Forecast and Analysis of the North American Automotive Industry (Ann Arbor, MI: Office for the Study of Automotive Transportation, University of Michigan Transportation Research Institute, 1994), pp. 71–75.