D. N. Onunkwo, G. Daniel-Igwe, V. Odoemelam, C. A. Agida, and B. N. Ezenyilimba, “Growth performance and feed cost benefit of broiler chickens fed Acha grain-based diet supplemented with different plant protein sources”, NJAP, vol. 47, no. 6, pp. 113–119, Feb. 2021.