1. Caldwell, J., 2000. Personal Communications. United States Environmental Protection Agency, Office of Transportation and Air Quality, Caldwell.jim@epa.gov.
2. Lincoln, K.J., 2000. The secret history of lead: special report. The Nation March, 11–45.
3. McCarthy, J.E., Tiemann, M., 2000. MTBE in gasoline: clean air and drinking water issues (February). Congressional Research Service Report for Congress of the United States, 18 pp.
4. National Reformulated Gasoline Hotline (NRGH), 1999. History and Overview of the Reformulated Gasoline Program: A Brief Book for the Members of the Congress of the United States and Staff, 52 pp.
5. Fueling the cells;Sharke;American Society of Mechanical Engineers: Mechanical Engineering,1999