ASHMORE, Patrick J. Low cairns, long cists and symbol stones. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 110, p. 346–355, 1981. DOI: 10.9750/PSAS.110.346.355. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/9032. Acesso em: 23 apr. 2024.