CURSITER, James W. Note on a Stone bearing an Incised Cross, from the Site of St Colm’s Chapel, Walls, Orkney. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 32, p. 50–52, 1898. DOI: 10.9750/PSAS.032.50.52. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/6690. Acesso em: 6 may. 2024.