DOCKRILL, Steven J. A resistivity survey at Tofts Ness, Sanday, Orkney. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 114, p. 586–588, 1985. DOI: 10.9750/PSAS.114.586.588. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/9181. Acesso em: 5 may. 2024.