GRAHAM-CAMPBELL, James. Two Viking-age silver brooch fragments believed to be from the 1858 Skaill (Orkney) hoard. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 114, p. 289–301, 1985. DOI: 10.9750/PSAS.114.289.301. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/9165. Acesso em: 6 may. 2024.