ELKINGTON, T.T. Studies on the Variation of the Genus Dryas in Greenland. Meddelelser om Grønland, [S. l.], v. 178, n. 1, p. 56 pp., 1965. Disponível em: https://tidsskrift.dk/meddrgroenland/article/view/155284. Acesso em: 28 dec. 2025.