1. S. Postel, "Water and Agriculture" in Water in Crisis: A Guide to the World's Fresh Water Resources, P. H. Gleick, Ed., pp. 56-66, Oxford University Press, Oxford (1993).
2. W.G.M. Bastiaanssen, T. Thiruvengadachari, R. Sakthivadivel, and D.J. Molden, "Satellite remote sensing for estimating productivities of land and water," Int. Water Res. Dev. 15, 181-196 (1999) 10.1080/07900629949005
3. D. J. Molden, "Accounting for water use and productivity," SWIM Paper 1, IWMI, Colombo, 1-16 (1997).
4. P. Raskin, E. Hansen, Z. Zhu, and D. Stavisky. "Simulation of water supply and demand in the Aral Sea Region," Water Int. 17, 55-67 (1992).
5. P. S. Thenkabail, R. B. Smith, and E. De-Pauw, "Evaluation of narrowband and broadband vegetation indices for determining optimal hyperspectral wavebands for agricultural crop characterization," Photogram. Engin Rem. Sens. 68(6), 607-621 (2002).