Callander, J Graham. “Notices of (1) a Stone Axe-Hammer from Perthshire; And (2) Prehistoric and Mediaeval Graves on Airngath Hill, Near Bo’ness”. Proceedings of the Society of Antiquaries of Scotland, vol. 60, Nov. 1926, pp. 257-61, doi:10.9750/PSAS.060.257.261.