LEHMHUS, J.; GUSTAVSSON, C. G. Hybrids between Bar-headed Goose Anser indicus and Snow Goose Anser caerulescens. Ornis Svecica, Lund, Sweden, v. 24, n. 3–4, p. 147–163, 2014. DOI: 10.34080/os.v24.22556. Disponível em: https://journals.lub.lu.se/os/article/view/22556. Acesso em: 29 jan. 2023.