Colchester, Marcus; Apte, Tejaswini; Laforge, Michel; Mandondo, Alois; Pathak, Neema(Center for International Forestry Research (CIFOR), Bogor, Indonesia, 2003)
Komarudin, Heru; Siagian, Yuliana L.; Colfer, Carol J. Pierce(CGIAR System-wide Program on Property Rights and Collective Action, International Food Policy Research Institute, Washington, DC, 2008)