SOMERVILLE, J. Notice of Cup-and Ring-marked Rocks on the Stronach Ridge, near Brodick, in Arran. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 35, p. 315–324, 1901. DOI: 10.9750/PSAS.035.315.324. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/6815. Acesso em: 25 apr. 2024.