CURLE, Cecil L. The Chronology of the Early Christian Monuments of Scotland. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 74, p. 60–116, 1940. DOI: 10.9750/PSAS.074.60.116. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/8131. Acesso em: 5 may. 2024.