Krumalova, Veronika; Backman, Stefan(Sustainable Agriculture in Central and Eastern European Countries (CEESA), Humboldt University, Berlin, Germany, 2003)
Vermillion, Douglas L.; Samad, Madar; Pusposutardjo, Suprodjo; Arif, Sigit S.; Rochdyanto, Saiful(International Water Management Institute (IWMI), Colombo, Sri Lanka, 2000)
Hussain, Intizar; Raschid-Sally, Liqa; Hanjra, Munir A.; Marikar, Fuard; Van Der Hoek, Wim(International Water Management Institute, Colombo, Sri Lanka, 2001)
Shah, Tushaar; Van Koppen, Barbara; Merrey, Douglas J.; de Lange, Marna; Samad, Madar(International Water Management Institute (IWMI), Colombo, Sri Lanka, 2002)
Mahoo, Henry F.; Mkoga, Zakaria J.; Kasele, Sydney Stephen; Igbadun, Henry E.; Hatibu, Nuhu; Rao, Karuturi P. C.; Lankford, Bruce(International Water Management Institute, Colombo, Sri Lanka, 2008)