LITWINIAK, K.; PRZYMENCKI, M. Long-eared Owl Asio otus breeding in a Caspian Gull Larus cachinnans colony: Reversed roles in protective nesting association?. Ornis Svecica, Lund, Sweden, v. 30, p. 73–78, 2020. DOI: 10.34080/os.v30.22033. Disponível em: https://journals.lub.lu.se/os/article/view/22033. Acesso em: 24 sep. 2022.