Berta, A., C.E. Ray and A.R. Wyss. 1989. Skeleton of the oldest known pinniped, Enaliarctos mealsi. Science 244:60-62.
Berta, A. 1991. New Enaliarctos* (Pinnipedimorpha) from the Miocene of Oregon and the role of "Enaliarctids" in Pinniped Phylogeny. Smithsonian Contributions to Paleobiology 69.
Dixon, D., Moody, R., Jenkins, I. and Zhuravlev, A.Y., Cassell's Atlas of Evolution. Oxford 2001
Wallace, D.R. 2007. Neptune's Ark: From Ichthyosaurs to Orcas. University of California Press.
