GJERSHAUG, J. O.; DISERUD, O. H.; RASMUSSEN, P. C.; WARAKAGODA, D. An overlooked threatened species of eagle: Legge’s Hawk Eagle Nisaetus kelaarti (Aves: Accipitriformes). Zootaxa, Auckland, New Zealand, v. 1792, n. 1, p. 54–66, 2008. DOI: 10.11646/zootaxa.1792.1.4. Disponível em: https://mapress.com/zt/article/view/zootaxa.1792.1.4. Acesso em: 4 apr. 2025.