UND, H. Uber die Wanderungen der Schneeammer (Plectrophenax nivalis) im Spätwinter. Ornis Fennica, [S. l.], v. 42, n. 3, p. 69–75, 1965. Disponível em: https://ornisfennica.journal.fi/article/view/132705. Acesso em: 21 may. 2024.