1. Directive 2003/30/EC of the European Parliament and of the Council on the promotion of the use of biofuels or other renewable fuels for transport, 2003.
2. Directive 2009/28/EC of the European Parliament and of the Council on the promotion of the use of energy from renewable sources, 2009.
3. Biofuels Quota Act by the German Parliament. 2007. .
4. Ley 12/2007 del Sector de Hidrocaburos. 2007 [in Spanish].
5. EN 14214:2009. Automotive fuels. Fatty acid methyl esters (FAME) for diesel engines. Requirements and test methods; 2009.