NOBLE, James. Notice of a Stone, apparently a Sinker, with Incised Figures of Animals, from a Tumulus at Bridge of Brogar, Stennis, Orkney. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 22, p. 266–267, 1888. DOI: 10.9750/PSAS.022.266.267. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/6263. Acesso em: 5 may. 2024.