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3. Directive 2009/30/EC of the European parliament and of the Council. amending Directive 98/70/EC as regards the specification of petrol, diesel and gas-oil and introducing a mechanism to monitor and reduce greenhouse gas emissions and amending Council Directive 1999/32/EC as regards the specification of fuel used by inland waterway vessels and repealing Directive 93/12/EEC. Official Journal of European Union. 2009-5–6.
4. Well-to-Wheel evaluation for production of ethanol from wheat. Report by the Low CVP fuels working group, FWG-P-04–024;Punter,2004
5. Life cycle assessment of various cropping systems utilized for producing biofuels: bioethanol and biodiesel;Kim;Biomass Bioenerg,2005