McCartney, Matthew; Smakhtin, Vladimir; de Fraiture, Charlotte; Bekele Awulachew, Seleshi(International Water Management Institute, Colombo, Sri Lanka, 2008)
Catacutan, Delia; Bertomeu, Manuel; Arbes, Lyndon; Duque, Caroline; Butra, Novie(CGIAR System-wide Program on Property Rights and Collective Action, International Food Policy Research Institute, Washington, DC, USA, 2008)
Amare, Yared; Adal, Yigremew; Tolossa, Degafa; Castro, Alfonso Peter; Little, Peter D.(BASIS Greater Horn of Africa Program and the Institute for Development Research, Addis Ababa University, Ethiopia, 2000)