Griffiths, C. S.; Barrowclough, G. F.; et al. (2004), “Phylogeny of the Falconidae (Aves): a comparison of the efficacy of morphological, mitochondrial, and nuclear data”, J. Avian Biol.31 (1): 101–109, doi:10.1016/j.ympev.2003.11.019
Griffiths, C. S.; Barrowclough, G. F.; et al. (2004), “Phylogeny of the Falconidae (Aves): a comparison of the efficacy of morphological, mitochondrial, and nuclear data”, J. Avian Biol.31 (1): 101–109, doi:10.1016/j.ympev.2003.11.019