Schimming, B. C., C. A. Vicentini, L. F. Tirapelli, and D. P. da C. Tirapelli. “Morphological Examination of the Epididymal Duct in the Dog”. Brazilian Journal of Veterinary Research and Animal Science, vol. 39, no. 2, Jan. 2002, pp. 61-65, doi:10.1590/S1413-95962002000200001.