Saeed, Muhammad Mazhar; Ashraf, Muhammad; Asghar, Muhammad Nadeem; Bruen, Michael; Shafique, Muhammad Siddique(International Water Management Institute, Colombo, Sri Lanka, 2002)
Asghar, Muhammad Nadeem; Ahmad, Shahid; Shafique, Muhammad Siddique; Kahlown, Muhammad Akram(International Water Management Institute, Colombo, Sri Lanka, 2002)
Shiferaw, Bekele; Obare, Gideon; Muricho, Geoffrey(CGIAR System-wide Program on Property Rights and Collective Action, International Food Policy Research Institute, Washington, DC, 2006)
Chapman, Robert; Blench, Roger; Kranjac-Berisavljevic, Gordana; Zakariah, A. B. T.(Overseas Development Institute, London, Agricultural Research and Extension Network (AgREN), London, 2003)