CAVERS, Graeme; BARBER, John; RITCHIE, Matthew. The survey and analysis of brochs. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 145, p. 153–176, 2016. DOI: 10.9750/PSAS.145.153.176. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/9828. Acesso em: 22 dec. 2024.