SIMPSON, W Douglas. Supplementary Note to the Excavation of Coull Castle. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 58, p. 370, 1924. DOI: 10.9750/PSAS.058.370. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/7610. Acesso em: 5 may. 2024.