1. Feduccia A (1999) The origin and evolution of birds. New Haven, Connecticut: Yale University Press.
2. Diversification of Neoaves: integration of molecular sequence data and fossils;PGP Ericson;Biol Lett,2006
3. Strong mitochondrial DNA support for a Cretaceous origin of modern avian lineages;JW Brown;BMC Biol,2008
4. Introns outperform exons in analyses of basal avian phylogeny using clathrin heavy chain genes;JL Chojnowski;Gene,2008
5. Cracraft J, Barker FK, Braun M, Harshman J, Dyke GJ, et al.. (2004) Phylogenetic relationships among modern birds (Neornithes): toward an avian tree of life. In: Cracraft J, Donoghue M, editors. Assembling the tree of life. New York, NY: Oxford University Press. 468–489.