HAGESKOV, Bjørn. Tonalit - dagens bjergart. Varv, [S. l.], v. 2000, n. 2, p. 63–64, 2000. DOI: 10.7146/varv.v2000i2.143693. Disponível em: https://tidsskrift.dk/varv/article/view/143693. Acesso em: 7 dec. 2025.