Drehmer, C. J., and L. R. Oliveira. “Occurrence of Gastroliths in South American Sea Lions (<i>Otaria byronia</I>) from Southern Brazil”. Latin American Journal of Aquatic Mammals 2, no. 2 (December 31, 2003): 123-126. Accessed May 4, 2024. https://lajamjournal.org/index.php/lajam/article/view/185.