Posso, Sérgio Roberto, and Camila Cardoso Salomão. “Osteology-Based Phylogeny and Systematics Implications of the Genus Asio (Strigiformes, Strigidae)”. Zootaxa 5584, no. 3 (February 10, 2025): 394–408. Accessed April 21, 2025. https://mapress.com/zt/article/view/zootaxa.5584.3.5.