1. Pauly, H. Arctic 16, 263–264 (1963).
2. Marland, G. Geochim. Cosmochim. Acta 39, 83–91 (1975).
3. Suess, E. et al. Science 216, 1128–1131 (1982).
4. Berthelsen, A. & Henriksen, N. Ivigtut 61 V.1 Syd. Geological Map of Greenland 1:100,000 (Geol. Surv. Greenland, Copenhagen, 1975).
5. Emeleus, C.H. Medd. Grønland 172(3), 1-75 (1964).