LUMSDEN, H W. Notes on the Excavation of a Kitchen-midden and on a Cup-marked Stone, at Den of Dun, Forfarshire. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 31, p. 240–243, 1897. DOI: 10.9750/PSAS.031.240.243. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/6666. Acesso em: 6 may. 2024.