TÖRNROOS, V. Hieman tunturikihun, Stercorarius longicaudus Vieill, muutosta. Ornis Fennica, [S. l.], v. 33, n. 3–4, p. 111–114, 1956. Disponível em: https://ornisfennica.journal.fi/article/view/132600. Acesso em: 17 sep. 2024.