CHRISTISON, David. On the Grated Iron Doors of Scottish Castles and Towers. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 17, p. 98–135, 1883. DOI: 10.9750/PSAS.017.98.135. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/6053. Acesso em: 26 apr. 2024.