Molle, François; Jayakody, Priyantha; Ariyaratne, B. Ranjith; Somatilake, H. S.(International Water Management Institute (IWMI), Colombo, Sri Lanka, 2005)
Birner, Regina; Gunaweera, Hasantha(CGIAR System-Wide Program on Property Rights and Collective Action, International Food Policy Research Institute (IFPRI), Washington, DC, 2001)