Hackett, S.J. (2008). "A Phylogenomic Study of Birds Reveals Their Evolutionary History". Science320 (5884): 1763–1768. doi:10.1126/science.1157704. பப்மெட்:18583609.
Hackett, S.J. (2008). "A Phylogenomic Study of Birds Reveals Their Evolutionary History". Science320 (5884): 1763–1768. doi:10.1126/science.1157704. பப்மெட்:18583609.