NOE-NYGAARD, N. Skal vi have istid igen?. Varv, [S. l.], v. 1970, n. 1, p. 12–17, 1970. DOI: 10.7146/varv.v1970i1.151085. Disponível em: https://tidsskrift.dk/varv/article/view/151085. Acesso em: 8 jan. 2025.