(1)
Sørensen, H.; Danø, M.; Petersen, O.; Povarennykh, A.; Platonov, A.; Tarashchan, A.; Belichenko, V. On the Mineralogy and Paragenesis of Tugtupite Na8Al2Be2Si8O24(Cl,S)2 from the Ilímaussaq Alkaline Intrusion, South Greenland. bullggu 1971, 95, 3-57.