Project 510: B.C. Livezey,R.L. Zusi. 2006. Higher-order phylogeny of modern birds (Theropoda, Aves: Neornithes) based on comparative anatomy: I. – Methods and characters. Bulletin of the Carnegie Museum of Natural History. 37:1-544.
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Livezey, B.C., R.L. Zusi. 2006. Higher-order phylogeny of modern birds (Theropoda, Aves: Neornithes) based on comparative anatomy: I. – Methods and characters. Bulletin of the Carnegie Museum of Natural History. Vol. 37, pp. 1-544.