KILPI, M.; PUNTTI, H.; TOIVONEN, T. Numbers of gulls nesting on the northern coast of the Gulf of Finland. Ornis Fennica, [S. l.], v. 57, n. 4, p. 153–160, 1980. Disponível em: https://ornisfennica.journal.fi/article/view/133050. Acesso em: 23 nov. 2024.