1. AAM Alliance of Automobile Manufacturers North American Fuel Survey, 2011.
2. ASTM D5798–11 “Standard Specification for Ethanol Fuel Blends for Flexible-Fuel Automotive Spark-Ignition Engines” Volume05.02, 2011.
3. http://www.afdc.energy.gov/afdc/fuels/stations_counts.html. Accessed August 23, 2012.
4. http://www.afdc.energy.gov/technology_bulletin_0210.html. Accessed August 23, 2012.
5. Control of Emissions from New and In-Use Highway Vehicles and Engines. Title 40 Code of Federal Regulations, Part 86, July 1, 2007.