Carvalhal, R., V. Borelli, and M. Miglino. “Morfology Study of the Spermatic Cord in Corriedale Sheeps (Ovis Aries, L. 1758)”. Brazilian Journal of Veterinary Research and Animal Science, Vol. 37, no. 5, Jan. 2000, pp. 348-54, doi:10.1590/S1413-95962000000500002.