BLACK, D D. Notice of Cairns, called ’Fairy Knowes,’ in Shetland, recently examined. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 6, p. 324–327, 1865. DOI: 10.9750/PSAS.006.324.327. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/5197. Acesso em: 4 may. 2024.