1. CO2 emissions from fuels combustion: 1971–2004;IEA – International Energy Agency,2006
2. Licht FO. World ethanol production growth may slow down in 2008. World ethanol & biofuels report; October 2007.
3. Licht FO. Sobering prospects – the world biodiesel production estimate. World ethanol & biofuels report; February 2008.
4. A review of the current state of bioenergy development;Global Bioenergy Partnership,2008
5. Sustainable biofuels: prospects and challenges;The Royal Society,2008