1. Energy Information Administration (EIA) Annual Energy Review [Internet]. Washington D.C.: United States Department of energy. c2013 – [cited 2015 Mar 2]. Available from: http://www.eia.gov/totalenergy/data/annual/Files updated Annually.
2. Biomass for a feedstock for bioenergy and bioproducts industry: the technical feasibility of a billion ton annual supply;Perlack,2005
3. Opportunities, barriers, and strategies for forest bioenergy and bio-based product development in the Southern United States;Mayfield;Biomass Bioenerg,2007
4. Stakeholder perspectives on converting forest biomass to energy in Oregon, USA;Stidham;Biomass Bioenerg,2011
5. Changing socio-economic conditions for private woodland protection;Lilieholm;Landscape-scale Cons Plan,2010