Greig, M. K., Greig, C., Shepherd, A. N., & Shepherd, I. A. G. (1990). A beaker cist at Chapelden, Tore of Troup, Aberdour, Banff and Buchan District, with a note on the orientation of beaker burials in north-east Scotland. Proceedings of the Society of Antiquaries of Scotland, 119, 73–81. https://doi.org/10.9750/PSAS.119.73.81