KÄLLANDER, Hans. Population dynamics of the Black-headed Gull Larus ridibundus in Sweden during the last 25 years. Ornis Svecica, Lund, Sweden, v. 6, n. 1–2, p. 5–16, 1996. DOI: 10.34080/os.v6.22991. Disponível em: https://journals.lub.lu.se/os/article/view/22991. Acesso em: 21 feb. 2024.