BRASH, Richard Rolt. Notices, Historical and Architectural, of the Round Tower of Brechin. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 4, p. 188–210, 1862. DOI: 10.9750/PSAS.004.188.210. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/4675. Acesso em: 26 apr. 2024.