Oliveira, A.R. de et al. 2018. Metastatic oral squamous cell carcinoma in a captive common hippopotamus (Hippopotamus amphibius). Brazilian Journal of Veterinary Pathology. 11, 2 (Jul. 2018), 64–67. DOI:https://doi.org/10.24070/bjvp.1983-0246.v11i2p64-67.