1. Annan, K.: A Challenge to the World's Scientists, Science, 299, 1485 , 2003.
2. Bates, B. C., Kundzewicz, Z. W., Wu, S., and Palutikof, J. P.: Climate Change and Water, IPPC Technical Paper VI, Intergovernmental Panel on Climate Change, IPPC Secretariat, Geneva, , 2008.
3. Falkenmark, M. and Rockström, J.: Balancing water for humans and nature; the new approach in ecohydrology, Earthscan, London, , 2004.
4. FAO: The state of food insecurity in the World 2008 – High food prices and food security – threats and opportunities, FAO, Rome, , 2008a.
5. FAO: The State of Food and Agriculture 2008 – Biofuels: prospects, risks and opportunities, FAO, Rome, , 2008b.