“A Zircon Age from Gabbro-Anorthosite Inclusions in the Gneisses of the Angmagssalik Area, South-East Greenland”. Rapport Grønlands Geologiske Undersøgelse, vol. 66, Dec. 1974, pp. 21-31, https://doi.org/10.34194/rapggu.v66.7399.