1. Agricultural Marketing Resource Center 2012 Ethanol Usage Projections & Corn Balance Sheet http://www.extension.iastate.edu/agdm/crops/outlook/cornbalancesheet.pdf
2. Ausubel , Jesse H. 2010 “Rethinking the inedible,” Martha's Vineyard Gazette http://www.bioneers.org/blog/rethinking-the-inedible