Earth-house at Portnacon, Sutherland. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 69, p. 431–433, 1935. DOI: 10.9750/PSAS.069.431.433. Disponível em: https://soas-test.journals.ed.ac.uk/index.php/psas/article/view/7951. Acesso em: 26 oct. 2025.