Hackett et al.: A Phylogenomic Study of Birds Reveals Their Evolutionary History. Science 27 June 2008: Vol. 320. no. 5884, pp. 1763 - 1768 DOI: 10.1126/science.1157704 [1]
senckenberg.de
Per G. P. Ericson et al.: Diversification of Neoaves: integration of molecular sequence data and fossils. Biol. Lett. doi:10.1098/rsbl.2006.0523 PDFArkiverad 25 mars 2009 hämtat från the Wayback Machine.
tolweb.org
Joseph W. Brown, John Harshman: Coraciiformes. Kingfishers, Bee-eaters, Rollers, and relatives. Version 27, Juni 2008 in The Tree of Life Web Project
web.archive.org
Per G. P. Ericson et al.: Diversification of Neoaves: integration of molecular sequence data and fossils. Biol. Lett. doi:10.1098/rsbl.2006.0523 PDFArkiverad 25 mars 2009 hämtat från the Wayback Machine.