Engell, J, J Hansen, M Jensen, H Kunzendorf, and L Lovborg. 1971. “Beryllium Mineralization in the Ilímaussaq Intrusion, South Greenland”. Rapport Grønlands Geologiske Undersøgelse 33 (January). Copenhagen, Denmark:1-40. https://doi.org/10.34194/rapggu.v33.7247.