Pickford, M. “Morotochoerus from Uganda (17.5 Ma) and Kenyapotamus from Kenya (13-11 Ma): Implications for Hippopotamid Origins”. Estudios Geológicos 67, no. 2 (December 30, 2011): 523–540. Accessed July 23, 2024. https://estudiosgeol.revistas.csic.es/index.php/estudiosgeol/article/view/861.