1. Abel O. 1901. Les dauphins longirostres du Boldérien (Miocéne supérieur) des environs d'Anvers. I. Mémoires du Musée Royal d'Histoire Naturelle de Belgique 1:1–95.
2. Achurra L. 2004. Cambios del nivel del mar y evolucién tecténica de la cuenca Neógena de Caldera, III Región. M.S. thesis, Departamento de Geología, Universidad de Chile, Santiago, Chile.
3. Arnason U. Guldberg A. . 1996. Cytochrome b nucleotide sequences and the identification of five primary lineages of extant cetaceans. Molecular Biology Evolution 13:407–417.
4. Barnes L. G. 1985. Fossil pontoporiid dolphin (Cetacea: Mammalia) from the Pacific coast of North America. Contributions in Science, Natural History Museum of Los Angeles County 363:1–34.
5. Brownell R. L. 1989. Franciscana, Pontoporia blainvillei (Gervais and d'Orbigny 1844). Pp. 45–67 in Handbook of marine mammals. Vol. 4. River dolphins and the larger toothed whales ( Ridgway S. H. Harrison R. J. , eds.). Academic Press, London, United Kingdom.