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Niels Henriksen; A.K. Higgins; Feiko Kalsbeek; T. Christopher R. Pulvertaft. Greenland from Archaean to Quaternary(PDF) (185). Greenland Survey Bulletin. 2000 [2009-10-04]. (原始内容(PDF)存档于2008-12-07).
Niels Henriksen; A.K. Higgins; Feiko Kalsbeek; T. Christopher R. Pulvertaft. Greenland from Archaean to Quaternary(PDF) (185). Greenland Survey Bulletin. 2000 [2009-10-04]. (原始内容(PDF)存档于2008-12-07).