KAINADY, P. V. G. Presence of down-like nestling plumage in Pallid Swift, Apus pallidus . Bulletin of Basrah Natural History Museum, [S. l.], v. 3, n. 1, 1976. Disponível em: https://bjnhm.uobasrah.edu.iq/index.php/nhm/article/view/47. Acesso em: 19 apr. 2025.