Asudi, G. O.; Ombwara, F. K.; Rimberia, F. K.; Nyende, A. B.; Ateka, E. M.; Wamocho, L. S.; Shitanda, Douglas; Onyango, A.(International Society for Horticultural Science (ISHS), 2009)
Kituu, G. M.; Shitanda, Douglas; Silayo, V.; Odote, P.; Bongyereire, J.(Inter-University Council for East Africa Lake Victoria Research Initiative, 2010)