SMITH, John. Excavation of the Forts of Castlehill, Aitnock, and Coalhill, Ayrshire. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 53, p. 123–134, 1919. DOI: 10.9750/PSAS.053.123.134. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/7465. Acesso em: 27 apr. 2024.