HEDGES, John W. A long cist at Sandside, Graemsay, Orkney. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 109, p. 374–378, 1980. DOI: 10.9750/PSAS.109.374.378. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/9014. Acesso em: 3 may. 2024.