Shepherd, A., A. S. Henshall, F. Powell, S. Rapson, and C. Wickham-Jones. “A Neolithic Ring-Mound at Midtown of Pitglassie, Auchterless, Aberdeenshire”. Proceedings of the Society of Antiquaries of Scotland, Vol. 126, Nov. 1997, pp. 17-51, doi:10.9750/PSAS.126.17.51.