1 2 3 Sibley C. G., Ahlquist J. E. Phylogeny and Classification of Birds. — New Haven: Yale University Press, 1990. — 1080 p. — ISBN 0-300-04085-7. ↑ Hackett S.J. et al A phylogenomic study of birds reveals their evolutionary history // Science. — 2008. — Vol. 320. — P. 1763—1768. ↑ Pacheco M.A., et al Evolution of modern birds revealed by mitogenomics: Timing the radiation and origin of major orders // Molecular Biology and Evolution. — 2011. — Vol. 28. — С. 1927—1942. ↑ Коблик Е. А., Волков С.