HORTLING, I. Till frågan om större strandpiparens, Charadrius hiaticula, raser. Ornis Fennica, [S. l.], v. 7, n. 3, p. 72–76, 1930. Disponível em: https://ornisfennica.journal.fi/article/view/132254. Acesso em: 27 dec. 2024.