Saleh, B., Kalla, D. J. U., Mbap, S. T., and Doma, U. D. “Influence of Varying Levels of Dietary Energy and Protein on Testicular Histomorphometry of Caged FUNAAB – Alpha Cocks”. Nigerian Journal of Animal Science and Technology (NJAST), Vol. 3, no. 2, Aug. 2020, pp. 176 -83, http://njast.com.ng/index.php/home/article/view/91.