Sir Howard Colvin. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 138, p. 1–5, 2009. DOI: 10.9750/PSAS.138.1.5. Disponível em: https://soas-test.journals.ed.ac.uk/index.php/psas/article/view/9714. Acesso em: 1 oct. 2025.