Krumalova, Veronika; Backman, Stefan(Sustainable Agriculture in Central and Eastern European Countries (CEESA), Humboldt University, Berlin, Germany, 2003)
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)
Meinzen-Dick, Ruth; Di Gregorio, Monica(CGIAR System-wide Program on Property Rights and Collective Action, International Food Policy Research Institute, Washingto , DC, USA, 2004)