DUDZIK, K.; CIACH, M.; JANKOWIAK, Łukasz; DOBOSZ, R.; BIELAK, E.; ALBRYCHT, M. Incestuous broods of the Whooper Swan Cygnus cygnus in Poland. Ornis Svecica, Lund, Sweden, v. 22, n. 1–2, p. 16–18, 2012. DOI: 10.34080/os.v22.22592. Disponível em: https://journals.lub.lu.se/os/article/view/22592. Acesso em: 23 may. 2022.