PETRIE, George. Notice of Excavations, and Discovery of Cists containing large Stone Urns in Stronsay, Orkney. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 8, p. 347–351, 1869. DOI: 10.9750/PSAS.008.347.351. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/5433. Acesso em: 25 apr. 2024.