CHRISTISON, David. Account of the Excavation of the Camps and Earthworks at Birrenswark Hill in Annandale, undertaken by the Society in 1898: (I) General History of the Place. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 33, p. 198–218, 1899. DOI: 10.9750/PSAS.033.198.218. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/6739. Acesso em: 3 may. 2024.