COOK, M.; CAVERS, G.; CRUICKSHANKS, G.; HUDSON, G.; HUNTER, F.; MCGIBBON, F.; WATSON, F.; BAILEY, G.; JONES, C.; RICHARDSON, P.; COOK, G. Torwood Broch. Proceedings of the Society of Antiquaries of Scotland, v. 149, p. 25-50, 30 nov. 2020.