Boessenecker, RW; Churchill, M (2016). „The origin of elephant seals: implications of a fragmentary late Pliocene seal (Phocidae: Miroungini) from New Zealand”. New Zealand Journal of Geology and Geophysics. 59 (4): 544—550. S2CID133343398. doi:10.1080/00288306.2016.1199437.
Boessenecker, RW; Churchill, M (2016). „The origin of elephant seals: implications of a fragmentary late Pliocene seal (Phocidae: Miroungini) from New Zealand”. New Zealand Journal of Geology and Geophysics. 59 (4): 544—550. S2CID133343398. doi:10.1080/00288306.2016.1199437.