BERTHELSEN, A. Bornholms fjeld. Varv, [S. l.], v. 1988, n. 2, p. 36–43, 1988. DOI: 10.7146/varv.v1988i2.144800. Disponível em: https://tidsskrift.dk/varv/article/view/144800. Acesso em: 22 jun. 2025.