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 Evolution25 (2): 267-77. PMID12414309. doi:10.1016/S1055-7903(02)00254-3.
Griffiths, Carole S.; Barrowclough, George F.; Groth, Jeff G.; Mertz, Lisa (2004). «Phylogeny of the Falconidae (Aves): a comparison of the efficacy of morphological, mitochondrial, and nuclear data». Molecular Phylogenetics and Evolution32 (1): 101-09. PMID15186800. doi:10.1016/j.ympev.2003.11.019.
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 Evolution25 (2): 267-77. PMID12414309. doi:10.1016/S1055-7903(02)00254-3.
Griffiths, Carole S.; Barrowclough, George F.; Groth, Jeff G.; Mertz, Lisa (2004). «Phylogeny of the Falconidae (Aves): a comparison of the efficacy of morphological, mitochondrial, and nuclear data». Molecular Phylogenetics and Evolution32 (1): 101-09. PMID15186800. doi:10.1016/j.ympev.2003.11.019.
NNPM NAN 41-646. Almost complete left tarsometatarsus. Probably a prehistoric hobby, perhaps less specialized for bird hunting: Sobolev, D.V. (2003): Новый вид плиоценового сокола (Falconiformes, Falconidae) [A new species of Pliocene falcon (Falconiformes, Falconidae)] Vestnik zoologii 37 (6): 85–87. [Russian with English abstract]
Stevenson, Angus; Brown, Lesley, eds. (2007). Diccionario Oxford de inglés más breve sobre principios históricos (6th. edición). Oxford: Oxford University Press. ISBN9780199206872. OCLC170973920.