HEDENSTRÖM, Lars. Breeding record of Horned Grebe Podiceps auritus in the outer archipelago of Östergötland in 2007. Ornis Svecica, Lund, Sweden, v. 18, n. 1, p. 65–67, 2008. DOI: 10.34080/os.v18.22678. Disponível em: https://journals.lub.lu.se/os/article/view/22678. Acesso em: 5 may. 2024.