Krüger, Oliver (2005). „The Evolution of Reversed Sexual Dimorphism in Hawks, Falcons and Owls: a comparative study”. Evolutionary Ecology. 19 (5): 467—486. S2CID22181702. doi:10.1007/s10682-005-0293-9.
Groombridge, Jim J.; Jones, Carl G.; Bayes, Michelle K.; van Zyl, Anthony J.; Carrillo, José; Nichols, Richard A.; Bruford, Michael W. (2002). „A molecular phylogeny of African kestrels with reference to divergence across the Indian Ocean”. Molecular Phylogenetics and Evolution. 25 (2): 267—77. PMID12414309. doi:10.1016/S1055-7903(02)00254-3.
Groombridge, Jim J.; Jones, Carl G.; Bayes, Michelle K.; van Zyl, Anthony J.; Carrillo, José; Nichols, Richard A.; Bruford, Michael W. (2002). „A molecular phylogeny of African kestrels with reference to divergence across the Indian Ocean”. Molecular Phylogenetics and Evolution. 25 (2): 267—77. PMID12414309. doi:10.1016/S1055-7903(02)00254-3.
Krüger, Oliver (2005). „The Evolution of Reversed Sexual Dimorphism in Hawks, Falcons and Owls: a comparative study”. Evolutionary Ecology. 19 (5): 467—486. S2CID22181702. doi:10.1007/s10682-005-0293-9.