J.E Onyibe, C.K. Daudu, J.T. Arokoyo, J.G. Akpoko, R.A. Gbadegesin and E.N. lwuafor, “Spread of Extra-Early Maize Varieties in the Drier Savanna Ecology of Nigeria”, Indian J Ext Edu, vol. 37, no. 3-4, pp. 116–124, Nov. 2024, doi: 10.48165/.