KÄLLANDER, Hans. Mute Swan Cygnus olor raises Greylag Anser anser goslings. Ornis Svecica, Lund, Sweden, v. 26, n. 3–4, p. 191–192, 2016. DOI: 10.34080/os.v26.22506. Disponível em: https://journals.lub.lu.se/os/article/view/22506. Acesso em: 29 mar. 2024.