Castro, Alfonso Peter; Amare, Yared; Adal, Yigremew; Tolossa, Degafa(BASIS Greater Horn of Africa Program and the Institute for Development Research, Addis Ababa University, Ethiopia, 1999)
Komarudin, Heru; Siagian, Yuliana L.; Oka, Ngakan Putu(CGIAR System-wide Program on Property Rights and Collective Action, International Food Policy Research Institute, Washington , DC , USA, 2007)
Ferris, Shaun; Engoru, Patrick; Kaganzi, Elly(CGIAR System-wide Program on Property Rights and Collective Action, International Food Policy Research Institute, Washington, DC, USA, 2008)
Harilal, K. N.; Kanji, Nazneen; Jeyaranjan, J.; Eapen, Mridul; Swaminathan, Padmini(International Institute for Environment and Development (IIED), London, 2006)
Shiferaw, Bekele; Obare, Gideon; Muricho, Geoffrey(CGIAR System-wide Program on Property Rights and Collective Action, International Food Policy Research Institute, Washington, DC, 2006)
Kaganzi, Elly; Ferris, Shaun; Barham, James; Abenakyo, Annet; Sanginga, Pascal; Njuki, Jemimah(CGIAR System-wide Program on Property Rights and Collective Action, International Food Policy Research Institute, Washington, DC, USA, 2008)