COLES, Frederick R. Report on the Stone Circles of North-Eastern Scotland, chiefly in Auchterless and Forgue, with measured Plans and Drawings, obtained under the Gunning Fellowship. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 37, p. 82–142, 1903. DOI: 10.9750/PSAS.037.82.142. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/6868. Acesso em: 19 apr. 2024.