Cook, M., H. Kdolska, L. Dunbar, R. Engl, S. Sagrott, and D. Druce. “New Light on Oblong Forts: Excavations at Dunnideer, Aberdeenshire”. Proceedings of the Society of Antiquaries of Scotland, Vol. 140, Nov. 2011, pp. 79-91, http://journals.socantscot.org/index.php/psas/article/view/9753.