1. United Nations Food and Agriculture Organization (FAO), “Global Forest Resources Assessment” (FAO, Rome, 2010).
2. World Resources Institute, “Millennium ecosystem assessment, ecosystems and human well-being: Biodiversity synthesis” (Washington, DC, 2005).
3. Columbia University's Center for International Earth Science Information Network, “Global rural-urban mapping project (GRUMP)” (NASA Socioeconomic Data and Applications Center, Palisades, NY, 2011).
4. Extinction by numbers
5. Forecasting Agriculturally Driven Global Environmental Change