DOCKRILL, Steven J. Resistivity survey of two settlement sites at Tofts Ness, Sanday, Orkney. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 116, p. 561–565, 1987. DOI: 10.9750/PSAS.116.561.565. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/9281. Acesso em: 20 apr. 2024.