1. 50m Environmental Refugees by End of Decade, UN Warns;Adam,2005
2. Afifi, T., Warner, K., 2008. The Impact of Environmental Degradation on Migration Flows across Countries. Working Paper No. 5. UNU-EHS, Bonn.
3. Environmental Refugees? Classifying Human Migrations Caused by Environmental Change;Bates;Population and Environment,2002
4. Damned Lies and Statistics. Untangling Numbers from the Media, Politicans, and Activists;Best,2001
5. When could global warming reach 4°C?;Betts;Philosophical Transactions of the Royal Society A,2011