Dahal, Ganga Ram; Adhikari, Krishna Prasad(CGIAR System-wide Program on Property Rights and Collective Action, International Food Policy Research Institute, Washington, DC, USA, 2008)
Somaratne, P. G.; Jinapala, K.; Perera, L. R.; Ariyaratne, B. Ranjith; Bandaragoda, D. J.; Makin, Ian(International Water Management Institute, Colombo, Sri Lanka, 2003)
Turner, Robin Lanette; Wu, Diana Pei(Berkeley Workshop on Environmental Politics, Institute for international Studies, University of California, Berkeley, 2002)