A. Umaru, M., H. S. Garba, J. B. Adeyanju, E. O. Oyedipe, A. Bello, A. A. Adeyeye, S. Buhari, and A. Jibril. 2012. “Oestrus Synchronization Using Cloprostenol in Red Sokoto Doe (RSD) in Sokoto”. Scientific Journal of Zoology 1 (5):87-90. http://www.sjournals.com/index.php/sjz/article/view/1177.