“The South Qôroq Centre Nepheline Syenites, South Greenland. Petrology, Felsic Mineralogy and Petrogenesis”. Bulletin Grønlands Geologiske Undersøgelse 118 (January 1, 1976): 1–55. Accessed November 10, 2025. https://geusjournals.org/index.php/bullggu/article/view/6660.