HOUMARK-NIELSEN, Michael. Danmark i istiden, en tegneserie. Varv, [S. l.], v. 1989, n. 2, p. 43–72, 1989. DOI: 10.7146/varv.v1989i2.144607. Disponível em: https://tidsskrift.dk/varv/article/view/144607. Acesso em: 6 dec. 2025.