Perrin, W.F.; Würsig, B.; Thewissen, J.G.M. (2009). Encyclopedia of marine mammals. Second edition. Academic Press: London. ISBN 978-0-12-373553-9. xxix, 1316 pp. (look up in IMIS) [details]
Currently recognized morphological differences between the two Giant Beaked Whale species are slight and limited to smaller adult size in Arnoux's beaked whale (8,5-9,75 m vs 9,1-11,1 m)