2015 · E. S. V. Narayana Rao, Charles A. O. Midega, et al. · CGSPace A Repository of Agricultural Research Outputs (Consultative Group for International Agricultural Research) · 6
2008 · Manyong, Victor M., Nindi, S.J., et al. · CGSPace A Repository of Agricultural Research Outputs (Consultative Group for International Agricultural Research)