Simpson, D D A, Eileen M Murphy, Richard A Gregory, and M McCartney. “Excavation of a Double Cist Burial from Gyre Farm, Orphir, Orkney”. Proceedings of the Society of Antiquaries of Scotland 137 (November 30, 2008): 59–67. Accessed April 19, 2024. https://journals.socantscot.org/index.php/psas/article/view/9695.