Peter Johnston. New morphological evidence supports congruent phylogenies and Gondwana vicariance for palaeognathous birds. „Zoological Journal of the Linnean Society”. 163 (3), s. 959–982, 2011. DOI: 10.1111/j.1096-3642.2011.00730.x. (ang.).
Bradley C. Livezey, Richard L. Zusi. Higher-order phylogeny of modern birds (Theropoda, Aves: Neornithes) based on comparative anatomy. II. Analysis and discussion. „Zoological Journal of the Linnean Society”. 149 (1), s. 1–95, 2007. DOI: 10.1111/j.1096-3642.2006.00293.x.
jboyd.net
J. Boyd III: Paleognathae. [w:] Taxonomy in Flux Checklist 3.08 [on-line]. John Boyd’s Home Page. [dostęp 2022-09-10]. (ang.).