MURRAY, Gordon. The declining Pictish symbol - a reappraisal. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 116, p. 223–253, 1987. DOI: 10.9750/PSAS.116.223.253. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/9269. Acesso em: 2 may. 2024.