^Field, Daniel J.; Benito, Juan; Chen, Albert; Jagt, John W. M.; Ksepka, Daniel T. (Mart 2020). "Late Cretaceous neornithine from Europe illuminates the origins of crown birds". Nature. 579 (7799). ss. 397-401. doi:10.1038/s41586-020-2096-0. ISSN0028-0836. PMID32188952.
^De Pietri, Vanesa L.; Scofield, R. Paul; Zelenkov, Nikita; Boles, Walter E.; Worthy, Trevor H. (Şubat 2016). "The unexpected survival of an ancient lineage of anseriform birds into the Neogene of Australia: the youngest record of Presbyornithidae". Royal Society Open Science. 3 (2). s. 150635. Bibcode:2016RSOS....350635D. doi:10.1098/rsos.150635. PMC4785986 $2. PMID26998335.
.jpg)
