Soibelzon, L.H.; Schubert, B.W. (2011). «The Largest Known Bear, Arctotherium angustidens, from the Early Pleistocene Pampean Region of Argentina: With a Discussion of Size and Diet Trends in Bears». Journal of Paleontology. 85: 69–75. CiteSeerX10.1.1.870.2014. doi:10.1666/10-037.1
Soibelzon, L.H.; Rincón, A.D. (2007). «The fossil record of the short-faced bears (Ursidae, Tremarctinae) from Venezuela. Systematic, biogeographic, and paleoecological implications». Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen. 244: 287–298. CiteSeerX10.1.1.827.6635. doi:10.1127/0077-7749/2007/0244-0287
Soibelzon, L.H.; Schubert, B.W. (2011). «The Largest Known Bear, Arctotherium angustidens, from the Early Pleistocene Pampean Region of Argentina: With a Discussion of Size and Diet Trends in Bears». Journal of Paleontology. 85: 69–75. CiteSeerX10.1.1.870.2014. doi:10.1666/10-037.1
Soibelzon, L.H.; Rincón, A.D. (2007). «The fossil record of the short-faced bears (Ursidae, Tremarctinae) from Venezuela. Systematic, biogeographic, and paleoecological implications». Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen. 244: 287–298. CiteSeerX10.1.1.827.6635. doi:10.1127/0077-7749/2007/0244-0287