Abdulazeez, H., H. Duwa, A. Blasu, U. Suleiman, and G. Theophilus. “Effect of Low Protein Diets Supplemented With Different Levels of Synthetic Methionine and Lysine on Performance of Broiler Chickens in Semi-Arid Environment”. Nigerian Journal of Animal Science, vol. 25, no. 1, Oct. 2023, pp. 78-83, https://njas.org.ng/index.php/php/article/view/1149.