Ornamental stones in West and South Greenland. Rapport Grønlands Geologiske Undersøgelse, Copenhagen, Denmark, v. 152, p. 50–55, 1991. DOI: 10.34194/rapggu.v152.8155. Disponível em: https://geusjournals.org/index.php/rapggu/article/view/8155. Acesso em: 20 oct. 2025.