Lerner, H., Christidis, L., Gamauf, A., Griffiths, C., Haring, E., Huddleston, C.J., Kabra, S., Kocum, A., Krosby, M., Kvaløy, K., Mindell, D., Rasmussen, P., Røv, N., Wadleigh, R., Wink, M. and Gjershaug, J.O. 2017. Phylogeny and new taxonomy of the Booted Eagles (Accipitriformes: Aquilinae). Zootaxa. 4216, 4 (Jan. 2017), 301–320. DOI:https://doi.org/10.11646/zootaxa.4216.4.1.