RHIND, Alexander Henry. Notes of excavations of Tumuli in Caithness, made in the Summer of 1856. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 2, p. 372–379, 1859. DOI: 10.9750/PSAS.002.372.379. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/4448. Acesso em: 4 may. 2024.