SIMPSON, W Douglas. The castles of Duffus, Rait, and Morton reconsidered. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 92, p. 10–14, 1961. DOI: 10.9750/PSAS.092.10.14. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/8571. Acesso em: 3 may. 2024.