Panabokke, Chris R.; Ariyaratne, B. Ranjith; Seneviratne, Anoja; Wijekoon, Deepthi; Molle, François(International Water Management Institute, Colombo, Sri Lanka, 2007)
Nielsen, Melanie; Hoogvorst, Anneke; Konradsen, Flemming; Mudasser, Muhammad; Van Der Hoek, Wim(International Water Management Institute, Colombo, Sri Lanka, 2001)