1. Global Forest Resources Assessment 2010, Main Report, FAO Forestry Paperhttp://www.fao.org/docrep/013/i1757e/i1757e.pdf
2. Detecting climate change effects on forest ecosystems in Southwestern Romania using Landsat TM NDVI data
3. UNCED-Agenda 21 1992, United Nations Conference on Environment & Development Rio de Janerio, Brazil, 3–14 June 1992, Chapter 11https://sustainabledevelopment.un.org/content/documents/Agenda21.pdf
4. The UE Forest Action Plan 2007–2011http://ec.europa.eu/agriculture/fore/publi/2007_2011/brochure_en.pdf
5. Tropical Deforestation as a Source of Green House Gas Emissions;Houghton,2005