Walmsley, Danny; Havenga, Tommie; Braune, Eberhard; Schmidt, Chris; Prasad, Krishna; Van Koppen, Barbara(International Water Management Institute, Colombo, Sri Lanka, 2004)
Johnson, Nancy; Suarez, Ruth; Lundy, Mark(CGIAR System-wide Program on Property Rights and Collective Action, International Food Policy Research Institute, Washington, DC, 2002)
Kariuki, Gatarwa; Place, Frank(CGIAR System-wide Program on Property Rights and Collective Action, International Food Policy Research Institute, Washington, DC, 2005)
Shah, Tushaar; Van Koppen, Barbara; Merrey, Douglas J.; de Lange, Marna; Samad, Madar(International Water Management Institute (IWMI), Colombo, Sri Lanka, 2002)
Ratinger, Tomás; Krumalova, Veronika; Prazan, Jaroslav(Sustainable Agriculture in Central and Eastern European Countries (CEESA), Berlin, Germany, 2004)