Semenov, E. I., M. E. Kazakova, and R. A. Aleksandrova. 1967. “1. The Lovozero Minerals-Nenadkevichite, Gerassimovskite and Tundrite- from Ilímaussaq, South Greenland”. Meddelelser Om Grønland 181 (5):1-12. https://tidsskrift.dk/meddrgroenland/article/view/153070.