TAYLOR, Michael W. On a Sculptured Stone with Cup and Ring-Markings, found at Redhills, near Penrith. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 16, p. 438–441, 1882. DOI: 10.9750/PSAS.016.438.441. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/6028. Acesso em: 1 may. 2024.