Mercer, Roger, Gordon Barclay, D Jordan, and Christopher Russell-White. “The Neolithic Henge-Type Enclosure at Balfarg”. Proceedings of the Society of Antiquaries of Scotland 118 (November 30, 1989): 61-67. Accessed February 28, 2024. http://journals.socantscot.org/index.php/psas/article/view/9322.