Semenov, E.I, H Sørensen, and Z.T Katajeva. 1968. “On the Mineralogy of Pyrochlore from the IlÍmaussaq Alkaline Intrusion, South Greenland”. Bulletin Grønlands Geologiske Undersøgelse 75 (June). Copenhagen, Denmark:9-27. https://doi.org/10.34194/bullggu.v75.6614.