COLES, Frederick R. Notice of Standing Stones, Cists, and hitherto unrecorded Cup-and-Ring-marks in various localities. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 40, p. 291–327, 1906. DOI: 10.9750/PSAS.040.291.327. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/7062. Acesso em: 7 may. 2024.