1. US Environmental Protection Agency Renewable Fuel Standard Program (RFS2) Regulatory Impact Analysis (EPA-420-R-10-006, February 2010)” - 420r10006.pdf http://www.epa.gov/otaq/renewablefuels/420r10006.pdf
2. Hanson C RIN prices climb to new heights Ethanol Producer Magazine - The Latest News and Data About Ethanol Production http://ethanolproducer.com/articles/10083/rin-prices-climb-to-new-heights