1. Agricultural Outlook, 2009-2018 2009 www.agri-outlook.org
2. A review of the current state of bioenergy development in G8 + 5 countries 2007 http://www.globalbioenergy.org/fileadmin/user_upload/gbep/docs/2007_events/wecrome2007/MASTER_GBEP_Report_final_16.11.2007_01.pdf
3. The State of Agriculture 2008 - Biofuels: prospects, risks and opportunities 2008
4. Sustainable Production of Second-Generation Biofuels
5. Bauen A Berndes G Junginger M Londo M Vuille F Bioenergy - a sustainable and reliable energy source. A review of status and prospects 2009 http://www.ieabioenergy.com/LibItem.aspx?id=6479