1. Crops and Drops: Making the Best Use of Water for Agriculture;FAO,2002
2. Ecosystems and their goods and services;Gitay,2001
3. FAO (2007). Water at a Glance. http://wwwfaoorg/nr/water/docs/waterataglancepdf2007.
4. Water: the invisible problem;Cominelli;EMBO Rep.,2009
5. The future of science: food and water for life;Eckardt;Plant Cell,2009