van Breemen, O, J.H Allaart, and M Aftalion. 1972. “Rb/Sr Whole Rock and U/Pb Zircon Age Studies on Granites of the Early Proterozoic Mobile Belt of South Greenland”. Rapport Grønlands Geologiske Undersøgelse 45 (January). Copenhagen, Denmark:45-48. https://doi.org/10.34194/rapggu.v45.7299.