COLES, Frederick R. A Record of the Cup-and Ring-Markings in the Stewartry of Kirkcudbright. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 29, p. 67–91, 1895. DOI: 10.9750/PSAS.029.67.91. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/6578. Acesso em: 18 apr. 2024.