NICOLSON, John. A Cross-Slab found at St John’s Chapel, Canisbay, Caithness. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 56, p. 66–67, 1922. DOI: 10.9750/PSAS.056.66.67. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/7534. Acesso em: 17 may. 2024.