C. J. Drehmer, M. E. Fabián, and J. O. Menegheti, “Dental anomalies in the atlantic population of south american sea lion, <i>Otaria byronia</i> (Pinnipedia, Otariidae): evolutionary implications and ecological approach”, Lat. Am. J. Aquat. Mamm., vol. 3, no. 1, pp. 7-18, Jun. 2004.