CURLE, Alexander O. Excavation of a Galleried Structure at Langwell, Caithness. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 46, p. 77–89, 1912. DOI: 10.9750/PSAS.046.77.89. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/7246. Acesso em: 17 may. 2024.