Ferreira, Ana Paula C., and Fabrizio Grandi. “Proliferative Arteriopathy of the Nasal Philtrum in Two Brazilian Mastiff Dogs”. Brazilian Journal of Veterinary Pathology 10, no. 2 (July 30, 2017): 47–51. Accessed October 19, 2025. https://bjvp.org.br/bjvp/article/view/234.