1. EC. Directive 2003/30/EC of The European Parliament and of the Council of 8 May 2003 on the promotion of the use of biofuels or other renewable fuels for transport. Brussels: Official Journal of the European Union, L123/42, 17.5.2003, http://ec.europa.eu/energy/res/legislation/doc/biofuels/en_final.pdf
2. COM 34 final. Communication from the Commission. An EU strategy for biofuels, {SEC(2006) 142}. European Commission: Brussels, 8.2.2006, http://ec.europa.eu/agriculture/biomass/biofuel/com2006_34_en.pdf
3. COM (2006) 848 final. Communication from the Commission to the European council and the European parliament. Renewable energy road map. Renewable energies in the 21st century: building a more sustainable future. European Commission: Brussels, 10.1.2007, http://ec.europa.eu/energy/energy_policy/doc/03_renewable_energy_roadmap_en.pdf
4. The Gallagher Review of the indirect effects of biofuels production;Renewable Fuels Agency,2008
5. Use of U.S. croplands for biofuels increases greenhouse gases through emissions from land-use change;Searchinger;Science,2008