Adejumo, R. O., O. A. Abiola, and O. G. Longe. “Performance and Serum Biochemistry of Broiler Chicken Fed Dietary Supplemental Methionine, Choline and Inorganic Sulphate”. Nigerian Journal of Animal Science, vol. 23, no. 1, Mar. 2021, pp. 28-34, https://www.njas.org.ng/index.php/php/article/view/873.