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)
Theesfeld, Insa(Central and Eastern European Sustainable Agriculture (CEESA), Humboldt University of Berlin, Department of Agricultural Economics and Social Sciences, Berlin, Germany, 2001)