Sobolev, V. S. (1970) “A preliminary Examination of Fluid inclusions in Nepheline, Sorensenite, Tugtupite and Chkallovite from the Ilímaussaq Alkaline Intrusion”., Meddelelser om Grønland, 181(11), p. 41 pp. Available at: https://tidsskrift.dk/meddrgroenland/article/view/153080 (Accessed: 28 December 2025).