CALDER, Charles S T; EDWARDS, A J H. Excavations of Three Neolithic Chambered Cairns – One with an Upper and a Lower Chamber – in the Islands of Eday and the Calf of Eday in Orkney: Including Report on the Pottery. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 72, p. 193–213, 1938. DOI: 10.9750/PSAS.072.193.213. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/8068. Acesso em: 14 jun. 2024.