MOONEY, John. Notes on Discoveries in St Magnus Cathedral, Kirkwall. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 59, p. 239–251, 1925. DOI: 10.9750/PSAS.059.239.251. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/7632. Acesso em: 23 apr. 2024.