BRYCE, Thomas H. The so-called heel-shaped cairns of Shetland, with remarks on the chambered tombs of Orkney and Shetland. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 74, p. 23–36, 1940. DOI: 10.9750/PSAS.074.23.36. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/8128. Acesso em: 8 may. 2024.