Kalsbeek, F. 1993. “Use of Rb-Sr Isotope Data to Constrain the Time of Deposition of Precambrian Metasediments: An Example from Hamborgerland, West Greenland”. Rapport Grønlands Geologiske Undersøgelse 159 (January). Copenhagen, Denmark:95-100. https://doi.org/10.34194/rapggu.v159.8216.