ALLEN, John Romilly. The Early Christian Monuments of Iona; with some suggestions for their better preservation. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 35, p. 79–93, 1901. DOI: 10.9750/PSAS.035.79.93. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/6800. Acesso em: 5 may. 2024.