Percy, Stephen L.; Kiser, Larry L.; Parks, Roger B.(Workshop in Political Theory and Policy Analysis, Indiana University, Bloomington, IN and the Department of Economics, Eastern Washington University, Cheney, WA, 1980)
Hoffmann, Volker; Lamers, John; Kidd, Andrew(Overseas Development Institute, London, Agricultural Research and Extension Network (AGREN), London, 2000)
Krishna, Anirudh(CGIAR System-wide Program on Property Rights and Collective Action, International Food Policy Research Institute, Washington, DC, 2003)