DUNCAN, J Garrow. Prehistoric Cairns and a Cross in the Parish of Kirkmichael, Banffshire. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 55, p. 207–212, 1921. DOI: 10.9750/PSAS.055.207.212. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/7508. Acesso em: 24 apr. 2024.