LUNDBERG, D. Grey Wagtail Motacilla cinerea and Dipper Cinclus cinclus breeding in tree cavities. Ornis Svecica, Lund, Sweden, v. 14, n. 1–2, p. 56–57, 2004. DOI: 10.34080/os.v14.22801. Disponível em: https://journals.lub.lu.se/os/article/view/22801. Acesso em: 6 jul. 2022.