WOOLLISCROFT, David J; HOFFMANN, Birgitta. The Roman Gask system fortlet of Glenbank, Perthshire. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 139, p. 167–193, 2010. DOI: 10.9750/PSAS.139.167.193. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/9749. Acesso em: 18 jul. 2024.