JENSEN, Aage. Røgkvarts – årstidens mineral. Varv, [S. l.], v. 1994, n. 2, p. 48–49, 1994. DOI: 10.7146/varv.v1994i2.144320. Disponível em: https://tidsskrift.dk/varv/article/view/144320. Acesso em: 6 dec. 2025.