CALDER, Charles S T; STEER, Kenneth A. Dun Lagaidh and four other prehistoric monuments near Ullapool, Ross and Cromarty. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 83, p. 68–76, 1951. DOI: 10.9750/PSAS.083.68.76. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/8332. Acesso em: 16 jun. 2024.