Salesa, M. J., Siliceo, G., Antón, M., Abella, J., Montoya, P., & Morales, J. (2006). Anatomy of the “false thumb” of Tremarctos ornatus (Carnivora, Ursidae, Tremarctinae): phylogenetic and functional implications. Estudios Geológicos, 62(1), 389–394. https://doi.org/10.3989/egeol.0662133