Ensink, Jeroen H. J.; Van Der Hoek, Wim; Matsuno, Yutaka; Munir, Sarfraz; Aslam, M. Rizwan(International Water Management Institute (IWMI), Colombo, Sri Lanka, 2002)
Johnson, Nancy; Ravnborg, Helle Munk; Westermann, Olaf; Probst, Kirsten(CGIAR System-wide Program on Property Rights and Collective Action, International Food Policy Research Institute, Washington, DC, 2001)