Stynder, D. D., & Kupczik, K. (2013). Tooth Root Morphology in the Early Pliocene African Bear Agriotherium africanum (Mammalia, Carnivora, Ursidae) and its Implications for Feeding Ecology. Journal of Mammalian Evolution, 20(3), 227-237. doi:10.1007/s10914-012-9218-x.