Armit, I., T. Cowie, I. Ralston, S. Boardman, A. Clarke, G. Coles, B. Finlayson, and M. Wilson. “Excavation of Pits Containing Grooved Ware at Hillend, Clydesdale District, Strathclyde Region”. Proceedings of the Society of Antiquaries of Scotland, Vol. 124, Nov. 1995, pp. 113-27, doi:10.9750/PSAS.124.113.127.