ELLIOT, J Walter; HENIG, Martin. Further engraved gemstones from Newstead (Trimontium), Roxburghshire. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 129, p. 393–398, 2000. DOI: 10.9750/PSAS.129.393.398. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/10054. Acesso em: 26 apr. 2024.