Colfer, Carol J. Pierce; Prabhu, Ravi; Gunter, Mario; McDougall, Cynthia; Miyasaka Porro, Noemi; Porro, Roberto(Center for International Forestry Research (CIFOR) , Jakarta, Indonesia, 1999)
Nkonya, Ephraim; Pender, John; Kato, Edward; Mugarura, Samuel; Muwonge, James(CGIAR System-wide Program on Property Rights and Collective Action, International Food Policy Research Institute, Washington, DC, 2005)