1. Aggarwal, P.K., Talukdar, K.K., Mall, R.K., 2000. Potential yields of Rice-Wheat system in the Indo-Gangetic plains of India. Rice-Wheat Consortium Paper Series 10. Rice-Wheat Consortium for the Indo-Gangetic Plains, New Delhi, India, pp. 16.
2. Fortunately there are substitutes for water otherwise our hydro-political futures would be impossible;Allan,1993
3. Overall perspectives on countries and regions;Allan,1994
4. Virtual water: a strategic resource, global solutions to regional deficits;Allan;Groundwater,1998
5. Virtual water – the water, food, and trade nexus: useful concept or misleading metaphor?;Allan;Water International,2003