A. Umaru, M., H. S. Garba, J. B. Adeyanju, A. Bello, E. O. Oyedipe, and S. Buhari. 2013. “Oestrus Synchronization and Superovulation in the Red Sokoto Doe (RSD) in Sokoto, Nigeria”. Scientific Journal of Zoology 2 (1):6-11. https://www.sjournals.com/index.php/sjz/article/view/1175.