WALKER, Iain C. The Clava Cairns. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 96, p. 87–106, 1965. DOI: 10.9750/PSAS.096.87.106. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/10094. Acesso em: 27 apr. 2024.