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Greenland | |
| Coulson, I. M. (2003). Evolution of the North Qôroq centre nepheline syenites, South Greenland: alkali-mafic silicates and the role of metasomatism. Mineralogical Magazine, 67(5), 873-892. Coulson, I. M., & Chambers, A. D. (1996). Patterns of zonation in rare-earth-bearing minerals in nepheline syenites of the North Qôroq center, South Greenland. The Canadian Mineralogist, 34(6), 1163-1178. |
| Petersen, O. V. (1995) Alkaline mineralforekomster i syd og syd-vest Grønland [Alcaline Mineral Localities in the South and Southwest Greenland]. Norsk Bergverksmuseum Skrift, 9. 7-17 |