HAMMER, C. U. Isboringer i central Grønland: GRIP og NORTH-GRIP. Varv, [S. l.], v. 1997, n. 2, p. 41–59, 1997. DOI: 10.7146/varv.v1997i2.143842. Disponível em: https://tidsskrift.dk/varv/article/view/143842. Acesso em: 17 feb. 2025.