Christian Muizon, Daryl P. Domning, Darlene R. Ketten: (Odobenocetops peruvianus), the walrus-convergent delphinoid (mammalia: cetacea) from the early pliocene of Peru. In: Smithsonian Contributions to Paleobiology. Band93, 2002, S.223–261, hier S. 224 (whoi.edu).