Sustainability aspects of biofuels
of resources: Assessing Biofuels. (This report came too late for this extensive assessment,
however, several of its summary conclusions have been cited and added during the final revision).
Umbach F. 2010. Global energy security and the implications for the EU. Energy Policy 38,
12291240.
USDA (United States Departement of Agriculture) 2012. USDA Agricultural Projections to 2021.
[Online] http://www.ers.usda.gov/features/bioenergy/
Zuurbier, P. Vooren, Jos van de. 2008. Sugarcane ethanol. Wageningen Academic Publisher: The
Netherlands.