CRAWFORD, W C. Notes on the Grave Slabs and Cross at Keills, Knapdale, Argyll. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 54, p. 248–252, 1920. DOI: 10.9750/PSAS.054.248.252. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/7490. Acesso em: 6 may. 2024.