ERDRICH, Michael; GIANNOTTA, Kristina M; HANSON, William S. Traprain Law: native and Roman on the northern frontier. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 130, p. 441–456, 2002. DOI: 10.9750/PSAS.130.441.456. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/9525. Acesso em: 5 may. 2024.