CALDER, Charles S T. A Neolithic double-chambered cairn of the stalled type and later structures on the calf of Eday, Orkney. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 71, p. 115–154, 1937. DOI: 10.9750/PSAS.071.115.154. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/8042. Acesso em: 20 apr. 2024.