SJÖGREN, A.-K.; WALDENSTRÖM, J. Plumage changes in an intersex Mallard Anas platyrhynchos over a six-year period. Ornis Svecica, Lund, Sweden, v. 31, p. 68–74, 2021. DOI: 10.34080/os.v31.22427. Disponível em: https://journals.lub.lu.se/os/article/view/22427. Acesso em: 24 sep. 2022.