Hackett et al.: A Phylogenomic Study of Birds Reveals Their Evolutionary History. In: Science. Band 320, Nr. 5884, 2008, S. 1763–1768, doi:10.1126/science.1157704.
Per G. P. Ericson et al.: Diversification of Neoaves: integration of molecular sequence data and fossils. In: Biology Letters. Band 2, Nr. 4, 2006, S. 543–547, doi:10.1098/rsbl.2006.0523.
Gerald Mayr: Morphological evidence for sister group relationship between flamingos (Aves: Phoenicopteridae) and grebes (Podicipedidae). In: Zoological Journal of the Linnean Society. 140. Jahrgang, Nr.2, Februar 2004, S.157–169, doi:10.1111/j.1096-3642.2003.00094.x (englisch).