1. Yacobucci, B.; Womach, J. Fuel Ethanol: Background and Public Policy Issues; In Congressional Research Service Report for Congress, 2004.
2. Results of the December 4–5, 2002 Air Emission Compliance Test at the Ethanol 2000 Facility Located in Bingham Lake, Minnesota; Interpoll Laboratories, I.: Circle Pines, MN, 2003.
3. Results of the January 28–30, 2003 Air Emission Compliance Test at the Agri-Energy Facility Located in Luverne, Minnesota; Interpoll Laboratories, I.: Circle Pines, MN, 2003.
4. Results of the January 21–23, 2003 Air Emission Compliance Test at the Al-Corn Clean Fuel Facility Located in Claremont, Minnesota; Interpoll Laboratories, I.: Circle Pines, MN, 2003.
5. Results of the August 3, 2004 Air Emission Compliance Test at the Al-Corn Clean Fuel Facility Located in Claremont, Minnesota; Interpoll Laboratories, I.: Circle Pines, MN, 2003.