GUSTAVSSON, C G. Coloured tail-coverts in Anser × Branta goose hybrids despite all-white coverts in both parent species. Ornis Svecica, Lund, Sweden, v. 20, n. 2, p. 67–75, 2010. DOI: 10.34080/os.v20.22637. Disponível em: https://journals.lub.lu.se/os/article/view/22637. Acesso em: 29 mar. 2024.