“Xonotlite-, Pectolite- and Natrolite-Bearing Fracture Veins in Volcanic Rocks from Nûgssuaq, West Greenland”. Bulletin Grønlands Geologiske Undersøgelse 80 (May 19, 1969): 1–21. Accessed November 11, 2025. https://geusjournals.org/index.php/bullggu/article/view/6620.