Olopade, J. O., P. C. Ozegbe, M. A. Nssien, O. O. Igado, M. O. Akpan, S. G. Olukole, O. O. Aina, S. K. Onwuka, and B. O. Oke. “A Rare Case of Left Additional Renal Artery in a Nigerian Goat”. Italian Journal of Anatomy and Embryology, vol. 115, no. 3, Dec. 2010, pp. 241-4, https://oajournals.fupress.net/index.php/ijae/article/view/1086.