ABERCROMBY, John. Report on Excavations at Fethaland and Trowie Knowe, Shetland; and of the Exploration of a Cairn on Dumglow, one of the Cleish Hills, Kinross-shire. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 39, p. 171–184, 1905. DOI: 10.9750/PSAS.039.171.184. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/6936. Acesso em: 6 dec. 2024.