ROSS, Thomas. Ancient Sundials of Scotland (with Illustrations). Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 24, p. 161–273, 1890. DOI: 10.9750/PSAS.024.161.273. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/6360. Acesso em: 26 apr. 2024.