• Bouvier EL. 1892. Anatomical observations on hyperoodon rostratus lilljeborg. Ann Nat Sci Zoo 13: 259320, 257–258.
  • Clarke MR. 1996. The role of the cephalopods in the world's oceans. Philos Trans R Soc Lond Biol Sci B 351: 9771112.
  • Harrison RJ, Johnson FR, Young BA. 1970. The oesophagus and stomach of dolphins (Tursiops, Delphinus, Stenella). J Zool 160: 377390.
  • Home E. 1807. Observations on the structure of the different cavities, which constitute the stomach of the whale, compared with ruminating animals, with a view to ascertain the situation of the digestive organ. Philos Trans R Soc Lond MDCCCVII: 93102, pls III, IV.
  • Hunter J. 1787. Observations on the structure and economy of whales. Philos Trans R Soc Lond 77: 306351, pl. 5.
  • Jungklaus F. 1898. Der magen der Cetaceen. Jenaische Zeitschrift Naturwissenschaften 32: 194, pls 1, 2.
  • Langer P. 1985. The mammalian stomach: structure, diversity and nomenclature. Acta Zool Fennica 170: 99102.
  • Langer P. 1988. The mammalian herbivore stomach: comparative anatomy, function and evolution. Stuttgart: Gustav Fischer. xvii + 557 p.
  • Mead JG. 1993. The systematic importance of stomach anatomy in beaked whales. [International Marine Biology Research Institute, Kamogawa, Japan]. IBI Reports 4: 7586.
  • Moore JC. 1968. Relationships among the living genera of beaked whales with classifications, diagnoses and keys. Fieldiana: Zoology 53: 209298.
  • Pernkopf E, Lehner J. 1937. Vorderdarm. Vergleichended Beschreibuung des Vorderdarmes bei den einzelnen Klassen der Kranioten. In: BolkL, GöppertE, KalliusE, LuboschW, editors. Handbuch der Vergleichenden Anatomie der Wirbeltiere. Band III, Berlin: Urban and Schwarzenberg. p 349476.
  • Scott JH, Parker TJ. 1889. On a specimen of Ziphius recently obtained near Dunedin. Trans Zool Soc Lond 12: 241248, pls xlviii–l.
  • Slijper EJ. 1962. Whales. London: Hutchinson and Co. 475 p.
  • Turner W. 1869. Further observations of the stomach in the Cetacea. J Anat Physiol 3: 117119.
  • Turner W. 1885. The anatomy of a second specimen of Sowerby's whale (Mesoplodon bidens) from Shetland. J Anat Physiol 20: 144188, pl. 4.
  • Turner W. 1889. Additional observations of the stomach in the ziphioid and delphinoid whales. J Anat Physiol 23: 466492.
  • Tyson E. 1680. Phocaena: or the anatomy of the porpus, dissected at Gresham College. London: B. Tooke. 48 p, 2 pls.
  • Vrolik W. 1848. Natuur- en ontleedkundige beschwouwing van den Hyperoodon. Natuurkundige Verhandlingen van de Hollandsche Maatschappij der Wetenschappen te Haarlem, Tweede Verzameling, 5e Deel, 1e Stuk. p 1128, pls. I–XV.
  • Weber M. 1886. Studies of more saugethiere. A contribution to the question of the origin of the cetacean. Jena, Gustav Fischer, viii, 248.