1. The end of cheap oil. scientific American;Campbell,1998
2. Biofuels for transport - an international perspective;International Energy Agency (IEA),2004
3. Can Brazil replace 5% of the 2025 gasoline world demand with ethanol?;Cerqueira Leite;Energy,2009
4. The false promise of biofuels - a special report from the International Forum on Globalization and the Institute for Policy studies;Santa Barbara,2007
5. The biofuel delusion: the fallacy of large-scale agro-biofuel production;Giampietro,2009