Ani, A. O., and A. U. Okorie. “Performance of Broiler Finishers Fed Graded Levels of Processed Castor Oil Bean (Ricinus Communis L) Meal Supplemented With DL-Methionine”. Nigerian Journal of Animal Production, vol. 36, no. 1, Jan. 2021, pp. 61-73, doi:10.51791/njap.v36i1.1053.