PALMGREN, P. Einige quantitative Vogelbestandsaufnahmen aus Muonio, Lappland. Ornis Fennica, [S. l.], v. 8, n. 3–4, p. 73–84, 1931. Disponível em: https://ornisfennica.journal.fi/article/view/132270. Acesso em: 13 may. 2024.