CANNEL, John; LEWIS, John. Excavations at Hillslap Tower, Roxburghshire, 1983-4. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 125, p. 1119–1129, 1996. DOI: 10.9750/PSAS.125.1119.1129. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/9918. Acesso em: 2 may. 2024.