1. The Official Site of the National Biodiesel Board: Biodiesel.org, FAQ.http://www.biodiesel.org/resources/faqs/(accessed on Feb 26, 2010) .
2. Renewable Fuels Association Website: RFA, The Industry, Statistics.http://www.ethanolrfa.org/industry/statistics/(accessed on Feb 26, 2010) .
3. Myllyoja, J.; Aalto, P.; Savolainen, P.; Purola, V.; Alopaeus, V.; Gronqvist, J.U.S. Patent Application Number 20,070,010,682, 2007.