Oliveira, Ayisa R. de, Alexandre Arenales, Thaynara P. de Carvalho, Angela T. Pessanha, Herlandes P. Tinoco, Maria Elvira L. T. da Costa, Tatiane A. da Paixão, and Renato L. Santos. “Metastatic Oral Squamous Cell Carcinoma in a Captive Common Hippopotamus (Hippopotamus Amphibius)”. Brazilian Journal of Veterinary Pathology 11, no. 2 (July 30, 2018): 64–67. Accessed October 19, 2025. https://bjvp.org.br/bjvp/article/view/257.