“A Preliminary Examination of Fluid Inclusions in Nepheline, Sorensenite, Tugtupite and Chkalovite from the Ilímaussaq Alkaline Intrusion, South Greenland”. Bulletin Grønlands Geologiske Undersøgelse 81 (January 20, 1970): 1–41. Accessed January 6, 2026. https://geusjournals.org/index.php/bullggu/article/view/6621.