Barber, J., Duffy, A., O’Sullivan, J., McSweeny, K., Mills, C., & O’Sullivan, T. (1997). The excavation of two Bronze Age burial cairns at Bu Farm, Rapness, Westray, Orkney. Proceedings of the Society of Antiquaries of Scotland, 126, 103-120. Retrieved from http://journals.socantscot.org/index.php/psas/article/view/9931