Amman, Hans M.; Duraiappah, Anantha Kumar(International Institute for Environment and Development, London, and Institute for Environmental Studies, Amsterdam, 2001)
Smucker, Glenn R.; White, T. Anderson; Bannister, Michael(CGIAR System-Wide Program on Property Rights and Collective Action, International Food Policy Research Institute, Washington, DC, 2000)
Crewett, Wibke; Bogale, Ayalneh; Korf, Benedikt(CGIAR Systemwide Program on Collective Action and Property Rights (CAPRi), International Food Policy Research Institute, Washington, DC, 2008)