Yusuf, K., O. Isah, C. Onwuka, J. Olanite, A. Oni, and R. Aderinboye. “Effects of Enzyme Additive on Utrient Intake, Digestibility and Rumen Metabolites of Yearling Cattle Fed Grass-Hay Based Diet”. Nigerian Journal of Animal Science, vol. 15, no. 1, Apr. 2023, pp. 155-67, https://www.njas.org.ng/index.php/php/article/view/731.