COLES, Frederick R. Report on Stone Circles surveyed in Perthshire - North Eastern Section; with measured Plans and Drawings (obtained under the Gunning Fellowship). Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 42, p. 95–162, 1908. DOI: 10.9750/PSAS.042.95.162. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/7126. Acesso em: 25 apr. 2024.