Place, Frank; Kariuki, Gatarwa; Wangila, Justine; Kristjanson, Patti; Makauki, Adolf; Ndubi, Jessica(CGIAR System-wide Program on Property Rights and Collective Action, International Food Policy Research Institute, Washington, DC, 2002)
Sunderlin, William D.; Resosudarmo, Ida A. P.; Rianto, Edy; Angelsen, Arild(Center for International Forestry Research (CIFOR), Jakarta, Indonesia, 2000)