GREIG, Moira Kennedy; GREIG, Colvin; BASHAM, Ian; CALDWELL, David; MURRAY, Charles; SPEARMAN, Mike; YEOMAN, Peter. Remains of a 12th-century structure and other medieval features on the Knoll of Castle Point, Troup (Cullykhan), Banff and Buchan. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 119, p. 279–296, 1990. DOI: 10.9750/PSAS.119.279.296. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/9366. Acesso em: 19 apr. 2024.