1. Energy independence and security Act of 2007. Title II-energy security through increased production of biofuels; subtitle a—renewable fuel standard;U.S. Congress, House of Representatives,2007
2. Cellulosic biofuels begin to flow but in lower volumes than foreseen by statutory targets;Energy Information Administration (EIA),2013
3. EPA finalizes regulations for the national renewable fuel standard program for 2010 and beyond. Regulatory announcement. EPA-420-F-10–007;Environmental Protection Agency (EPA),2010
4. “EPA finalizes 2013 renewable fuel standards.” regulatory announcement. EPA-420-F-13–042;Environmental Protection Agency (EPA),2013