1. ADAS 2003 Renewable energy and its impact on rural development and sustainability in the UK http://seg.fsu.edu/Library/case%20of%20the%20UK.pdf
2. Estimation and relevance of bark proportion in a willow stand;Adler;Biomass and Bioenergy,2005
3. AEEP 2010a Africa-EU Renewable Energy Cooperation Programme http://www.africa-eu-partnership.org/sites/default/files/aeep_recp.pdf
4. AEEP 2010b The Energy Challenge: Access and Security for Africa and for Europe http://www.africa-eu-partnership.org/sites/default/files/energy_partnership_aeep_communication_paper_en_0.pdf
5. African Biodiversity Network, Biofuelwatch, EcoNexus, the Gaia Foundation, Salva La Selva and Watch Indonesia 2008 Agrofuels and the Myth of the Marginal Lands http://www.econexus.info/pdf/Agrofuels_&_Marginal-Land-Myth.pdf