1. Key world energy statistics;International Energy Agency,2009
2. Energy crops: current status and future prospects;Sims;Glob Chang Biol,2006
3. World agricultural production;United States Department of Agriculture,2008
4. Authorized capacity of biodiesel production plants;Agencia Nacional de Petroleo,2007
5. Empresa de Pesquisa Energética. Balanço Energético Nacional 2009: ano 2008 (BEN). Rio de Janeiro/ 2009. 274.