CRAW, John Hewat. Notes on Berwickshire Forts, with a Description of those Recently Discovered. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 55, p. 231–255, 1921. DOI: 10.9750/PSAS.055.231.255. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/7512. Acesso em: 20 apr. 2024.