B. Ekenyem and C. Onyeagoro, “Replacement Value of Bambaranut Voandzeia subterranea Sievate for Soyabean Meal Glycin max on the Performance of Finisher Broiler Chicken”, Int. J. Poult. Sci., vol. 5, no. 4, pp. 381–384, Mar. 2006, doi: 10.3923/ijps.2006.381.384.