↑Alderton, D. (1988) Turtles and tortoises of the world., Facts on File, New York.
↑ 3.03.1Bour, R. (1973) Contribution a la connaissance de Phrynops nasutus (Schweigger: 1812) et Phrynops tuberculatus (Luederwaldt: 1926). Description d'une nouvelle sous-espèce originaire du Paraguay, Phrynops tuberculatus vanderhaegei (Testudinata - Pleurodira - Chelidae)., Bull. Soc. Zool. France 98: 175-190
↑McCord, W. P., J.-O. Mehdi & W. W. Lamar (2001) A taxonomic reevaluation of Phrynops (Testudines: Chelidae) with the description of two new genera and a new species of Batrachemys., Rev. Biol. Trop., 49 (2): 715-764
↑ 5.05.1Bisby F.A., Roskov Y.R., Orrell T.M., Nicolson D., Paglinawan L.E., Bailly N., Kirk P.M., Bourgoin T., Baillargeon G., Ouvrard D. (ed.) (2011). "Species 2000 & ITIS Catalogue of Life: 2011 Annual Checklist". Species 2000: Reading, UK. Ginkuhà 24 Septyembre 2012.CS1 maint: multiple names: authors list (link) CS1 maint: extra text: authors list (link)