1. National Institute of Statistics and Economic Studies. Definitions and methods. http://www.insee.fr/en/methodes/default.asp?page=definitions/biomasse.htm
2. Directive 2009/28/EC of the European Parliament and of the Council of 23 April 2009 on the promotion of the use of energy from renewable sources and amending and subsequently repealing Directives 2001/77/EC and 2003/30/EC. http://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX:32009L0028&from=EN
3. Energy Independence and Security Act of 2007. Title XII section 1203(e)(z)(4)(A) P.L. 110–140. https://www.gpo.gov/fdsys/pkg/PLAW-110publ140/pdf/PLAW-110publ140.pdf
4. Memorandum of understanding on policy principles for woody biomass utilization for restoration and fuel treatments in forests, woodlands, and rangelands. http://www.fs.fed.us/woodybiomass/documents/BiomassMOU_060303_final_web.pdf
5. Perlack RD, Wright LL, Graham RL, Turhollow A, Stokes B, Erbach D. Biomass as feedstock for a bioenergy and bioproducts industry: the technical feasibility of a billion-ton annual supply. ORNL/TM-2005/66. U.S. Department of Energy. 2005.