Kalsbeek, F., and H. Zeck. “Preliminary Rb-Sr Whole-Rock Data for Archean and Nagssugtoqidian Rocks from the Søndre Strømfjord Area, West Greenland”. Rapport Grønlands Geologiske Undersøgelse, vol. 90, Dec. 1978, pp. 129-34, doi:10.34194/rapggu.v90.7611.