Zanco, Nilton Abreu, Ana Luisa Reginato, Maria Angélica Miglino, and Liberato João Afonso Didio. 1994. “The Constitution of the Portal Vein in Bovines of Nelore Breed”. Brazilian Journal of Veterinary Research and Animal Science 31 (1):13-18. https://doi.org/10.11606/issn.1678-4456.bjvras.1994.52043.