Kalsbeek, F. and Zeck, H. (1978) “Preliminary Rb-Sr whole-rock data for Archean and Nagssugtoqidian rocks from the Søndre Strømfjord area, West Greenland”, Rapport Grønlands Geologiske Undersøgelse. Copenhagen, Denmark, 90, pp. 129–134. doi: 10.34194/rapggu.v90.7611.