TYRBERG, Tommy. Crossbill (Genus Loxia) evolution in the West Palearctic – a look at the fossil evidence. Ornis Svecica, Lund, Sweden, v. 1, n. 1, p. 3–10, 1991. DOI: 10.34080/os.v1.19516. Disponível em: https://journals.lub.lu.se/os/article/view/19516. Acesso em: 26 apr. 2024.