Van Der Hoek, Wim; Sakthivadivel, R.; Renshaw, Melanie; Silver, John B.; Birley, Martin H.; Konradsen, Flemming(International Water Management Institute (IWMI), Colombo, Sri Lanka, 2001)
Place, Frank; Kariuki, Gatarwa; Wangila, Justine; Kristjanson, Patti; Makauki, Adolf; Ndubi, Jessica(CGIAR System-wide Program on Property Rights and Collective Action, International Food Policy Research Institute, Washington, DC, 2002)