Agnolin, Federico L. (Ιούλιος 2016). «Unexpected diversity of ratites (Aves, Palaeognathae) in the early Cenozoic of South America: Palaeobiogeographical implications». Alcheringa: An Australasian Journal of Palaeontology41 (1): 101-111. doi:10.1080/03115518.2016.1184898. ISSN0311-5518.
worldcat.org
Agnolin, Federico L. (Ιούλιος 2016). «Unexpected diversity of ratites (Aves, Palaeognathae) in the early Cenozoic of South America: Palaeobiogeographical implications». Alcheringa: An Australasian Journal of Palaeontology41 (1): 101-111. doi:10.1080/03115518.2016.1184898. ISSN0311-5518.