1. DOE (2011) US billion-ton update: biomass supply for a bioenergy and bioproducts industry. Perlack RD and Stokes BJ (Leads), ORNL/TM-2011/224. Oak Ridge National Laboratory, Oak Ridge, TN. p 227
2. DOE (US Department of Energy) (2003) Roadmap for agriculture biomass feedstock supply in the United States. US Department of Energy, DOE/NE-ID-1129
3. EIA (Energy Information Administration) (2011) Annual energy review 2010. US energy information administration, office of energy statistics, US Department of Energy, Washington, DC. http://www.eia.gov/totalenergy/data/annual/index.cfm , Accessed 20 Sep 2012
4. Henderson DE, Jose S (2010) Biomass production potential of three short rotation woody crop species under varying nitrogen and water availability. Agrofor Syst 80:259–273
5. Holzmueller EJ, Jose S (2012) Bioenergy crops in agroforestry systems: potential for the US North central region. Agrofor Syst 85:305–314