1. IEA. World Energy Outlook; 2009.
2. IEA. World Energy Outlook 2012. 2012 [cited 2013 02.04.2013]; Available from: .
3. IEA. CO2 emissions from fuel combustion. 2010 [cited 2013 02.04.2013]; Available from: .
4. Council Directive, 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, in L 123/42. 2003, European Parliament: Official Journal of the European Union.
5. Economic challenges for the future relevance of biofuels in transport in EU countries;Ajanovic;Energy,2010