MCB COX, Eoin; OWEN, Olwyn; PRINGLE, Denys; CRONE, A; PATERSON, L. The discovery of medieval deposits beneath the Earl’s Palace, Kirkwall, Orkney. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 128, p. 567–580, 1999. DOI: 10.9750/PSAS.128.567.580. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/10022. Acesso em: 5 may. 2024.