Dias, W., F. J. Faria, C. A. Fernandes, B. F. Sampaio, M. D. Santos, W. B. Rodrigues, J. C. Borges Silva, and D. S. Costa. “Testicular Echotexture Is Not a Viable Method to Indirectly Evaluate the Spermatogenic Parameters in Nelore Bulls”. Austral Journal of Veterinary Sciences, vol. 49, no. 1, Nov. 2017, pp. 45-51, http://revistas.uach.cl/index.php/australjvs/article/view/727.