LERNER, HEATHER R.L. & DAVID P. MINDELL (2005): Phylogeny of eagles, Old World vultures, and other Accipitridae based on nuclear and mitochondrial DNA. Molecular Phylogenetics and Evolution 37:327–346 PDFArxivat 2011-06-06 a Wayback Machine. (anglès)
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LERNER, HEATHER R.L. & DAVID P. MINDELL (2005): Phylogeny of eagles, Old World vultures, and other Accipitridae based on nuclear and mitochondrial DNA. Molecular Phylogenetics and Evolution 37:327–346 PDFArxivat 2011-06-06 a Wayback Machine. (anglès)