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doi.org
Godfrey, Stephen J. (2008. június 12.). „[520:ANGASO2.0.CO;2 A new genus and species of late Miocene pontoporiid dolphin (Cetacea: Odontoceti) from the St. Marys Formation in Maryland]”. Journal of Vertebrate Paleontology28 (2), 520–528. o. DOI:[520:ANGASO2.0.CO;2 10.1671/0272-4634(2008)28[520:ANGASO]2.0.CO;2]. ISSN0272-4634.
Godfrey, Stephen J. (2008. június 12.). „[520:ANGASO2.0.CO;2 A new genus and species of late Miocene pontoporiid dolphin (Cetacea: Odontoceti) from the St. Marys Formation in Maryland]”. Journal of Vertebrate Paleontology28 (2), 520–528. o. DOI:[520:ANGASO2.0.CO;2 10.1671/0272-4634(2008)28[520:ANGASO]2.0.CO;2]. ISSN0272-4634.