1. Directive 2009/28/EC of the European Parliament and of the Council of 23 April 2009 on the Promotion of the Use of Energy from Renewable Sources and Amending and Subsequently Repealing Directives 2001/77/EC and 2003/30/EC, http://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX:32009L0028&from=EN
2. Renewable Transport Fuel Obligation statistics: obligation period 6, 2013/14, report 3, https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/306399/rtfo-2013-14-year-6-report-3.pdf
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4. Comparative Oxidative Stability of Fatty Acid Alkyl Esters by Accelerated Methods
5. Methyl and ethyl soybean esters as renewable fuels for diesel engines