Coles, F.R. 1906. Report on Stone Circles surveyed in the North-East of Scotland, chiefly in Banffshire, with measured Plans and Drawings, obtained under the Gunning Fellowship. Proceedings of the Society of Antiquaries of Scotland. 40, (Nov. 1906), 164–206. DOI:https://doi.org/10.9750/PSAS.040.164.206.