STEVENSON, Robert B K. A Roman intaglio ring from a native fort on Arthur’s Seat, Edinburgh. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 102, p. 293–294, 1973. DOI: 10.9750/PSAS.102.293.294. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/8785. Acesso em: 6 may. 2024.