1. Allan JA (1998) Virtual water: a strategic resource. Global solutions to regional deficits. Groundwater 36(4):545-546
2. Beekman GB (1998) Water conservation, recycling and reuse. Water Resour Dev 14(3):353-364
3. Beveridge MCM, Phillips MJ (1993) Environmental impact of tropical inland aquaculture. In: Pullin RSV, Rosenthal H, Maclean JL (eds) Environment and aquaculture in developing countries. ICLARM Conference Proceedings 31. Manila, ICLARM, pp 213-236
4. Block P, Strzepek K, Rosegrant MW (2005) Impacts of Considering Climate Variability on Investment Decisions in Ethiopia. International Food Policy Research Institute, Washington, DC
5. Bos E, Bergkamp G (2001) Water and the Environment. In: Meinzen-Dick RM, Rosegrant MW (eds) Overcoming Water Scarcity and Quality Constraints. 2020 Vision Focus 9. International Food Policy Research Institute, Washington, DC