Henshall, A.S. and Stewart, M.E.C. 1956. Excavations at Clach na Tiompan, Wester Glen Almond, Perthshire. Proceedings of the Society of Antiquaries of Scotland. 88, (Nov. 1956), 112–124. DOI:https://doi.org/10.9750/PSAS.088.112.124.