BARCHAM, R C. A lost radiocarbon date for Shetland. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 110, p. 502–506, 1981. DOI: 10.9750/PSAS.110.502.506. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/9039. Acesso em: 3 may. 2024.