Duffy, P. R. J., MacGregor, G., Pollard, T., Miller, J., Will, R., Evans, C., … Seivewright, J. (2005). The excavation of a mound and three cist burials at Ferndall, Rendall, Orkney. Scottish Archaeological Internet Reports, 16, 1–20. https://doi.org/10.9750/issn.2056-7421.2005.16.1-20