Molle, François; Jayakody, Priyantha; Ariyaratne, B. Ranjith; Somatilake, H. S.(International Water Management Institute (IWMI), Colombo, Sri Lanka, 2005)
Abdullaev, Iskandar; ul Hassan, Mehmood; Manthrithilake, Herath; Yakubov, Murat(International Water Management Institute (IWMI), Colombo, Sri Lanka, 2006)
Bastiaanssen, W.G.M.; Molden, David; Thiruvengadachari, S.; Smit, A. A. M. F. R.; Mutuwatte, Lal; Jayasinghe, Gayathri(International Water Management Institute (IWMI), Colombo, Sri Lanka, 1999)