"Specs table"(PDF). www.arb.ca.gov. Archived from the original(PDF) on 2017-02-21. Retrieved 2013-06-08.
doi.org
Werner Dabelstein, Arno Reglitzky, Andrea Schütze and Klaus Reders "Automotive Fuels" in Ullmann's Encyclopedia of Industrial Chemistry, 2007, Wiley-VCH, Weinheim.doi:10.1002/14356007.a16_719.pub2