1. Alcamo, J., Döll, P., Kaspar, F., Siebert, S., 1997. Global change and global scenarios of water use and availability: an application of WaterGAP 1.0. Center for Environmental Systems Research (CESR), University of Kassel, Germany.
2. Alcamo, J., Henrichs, T., Rösch, T., 2000. World water in 2025—global modeling and scenario analysis for the World Commission on Water for the 21st Century. Center for Environmental Systems Research, University of Kassel, Kurt Wolters Strasse 3, 34109 Kassel, Germany.
3. Virtual water;Allan;Ground Water,1998
4. Allen, R.G., Pereira, L.S., Raes, D., Smith, M., 1998. Crop evapotranspiration: Guidelines for computing crop water requirements. FAO Irrigation and Drainage Paper 56. Food and Agriculture Organization of the United Nations, Rome, Italy.
5. Climate change and global water resources;Arnell;Global Environmental Change,1999