Mkoga, Zakaria J.; Lankford, Bruce; Hatibu, Nuhu; Mahoo, Henry F.; Rao, Kumar P. C.; Kasele, Sydney Stephen(Comprehensive Assessment of Water Management in Agriculture, Sweden, 2005)
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)