Panabokke, Chris R.; Ariyaratne, B. Ranjith; Seneviratne, Anoja; Wijekoon, Deepthi; Molle, François(International Water Management Institute, Colombo, Sri Lanka, 2007)
Walmsley, Danny; Havenga, Tommie; Braune, Eberhard; Schmidt, Chris; Prasad, Krishna; Van Koppen, Barbara(International Water Management Institute, Colombo, Sri Lanka, 2004)