SIMPSON, W Douglas. The Early Castles of Mar. (First Paper.). Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 63, p. 102–138, 1929. DOI: 10.9750/PSAS.063.102.138. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/7753. Acesso em: 2 may. 2024.