UPTON, Brian G. J. The geology of Tugtutôq and neighbouring islands South Greenland, Part II. Nordmarkitic syenites and related alkaline rocks. Meddelelser om Grønland, [S. l.], v. 170, n. 1, p. 1–61, 1964. Disponível em: https://tidsskrift.dk/meddrgroenland/article/view/160422. Acesso em: 28 dec. 2025.