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http://www.sciencemag.org/cgi/content/full/296/5575/1968
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- Global biomass fuel resources, Matti Parikka - Biomass and Bioenergy 27 (2004) 613-620
- Conditions for the sustainability of biomass based fuel use ,L. Reijnders - BED/ECDO, University of Amsterdam, Nieuwe Achtergracht 166, 1018 WV Amsterdam, The Netherlands
- http://www.deugarte.com/el-ano-del-biofuel El Blog de David de Ugarte
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