RITCHIE, Anna. A fragment of a Pictish symbol-bearing slab with carving in relief from Mail, Cunningsburgh, Shetland. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 138, p. 185–191, 2009. DOI: 10.9750/PSAS.138.185.191. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/9722. Acesso em: 24 apr. 2024.