Rideout, James S, et al. “Excavation of a Promontory Fort and a Palisaded Homestead at Lower Greenyards, Bannockburn, Stirling, 1982–5”. Proceedings of the Society of Antiquaries of Scotland, vol. 126, Nov. 1997, pp. 199-6, doi:10.9750/PSAS.126.199.269.