COLES, Frederick R. Report on Stone Circles in Perthshire, principally Strathearn, with measured Plans and Drawings (obtained under the Gunning Fellowship). Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 45, p. 46–116, 1911. DOI: 10.9750/PSAS.045.46.116. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/7211. Acesso em: 3 may. 2024.