MACKAY, Angus. Sutherland and Caithness in Ancient Geography and Maps. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 42, p. 79–94, 1908. DOI: 10.9750/PSAS.042.79.94. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/7125. Acesso em: 23 apr. 2024.