NYBERG, C. Larus minutus Pall. als Nistvogel in Esbo (Südfinnland). Ornis Fennica, [S. l.], v. 4, n. 2, p. 33–36, 1927. Disponível em: https://ornisfennica.journal.fi/article/view/132180. Acesso em: 27 dec. 2024.