DANØ, M.; SØRENSEN, H. An examination of some rare minerals from the nepheline syenites of South West Greenland. Bulletin Grønlands Geologiske Undersøgelse, Copenhagen, Denmark, v. 20, p. 1–35, 1959. DOI: 10.34194/bullggu.v20.6553. Disponível em: https://geusjournals.org/index.php/bullggu/article/view/6553. Acesso em: 3 jul. 2024.