Reference documents and articles available on the Internet
International Energy Agency, Biofuels for transport - an international perspective, 2004..
Renewable Energy Policy Network for the 21st Century, Renewables Global Status Report 2005 and Renewables Global Status Report 2006 Update.
Worldwatch Institute, Biofuels for Transportation: Global Potential and Implications for Sustainable Agriculture and Energy in the 21st Century, 2006
Global Agriculture Information Network, China, Peoples Republic of, Bio-fuels An Alternative Future for Agriculture, Gain Report Number: CH6049, 2006