Stuart, John. “Account of Excavations in Groups of Cairns, Stone Circles, and Hut Circles on Balnabroch, Parish of Kirkmichael, Perthshire, and at West Persie, in That Neighbourhood”. Proceedings of the Society of Antiquaries of Scotland 6 (November 30, 1865): 402–410. Accessed April 19, 2024. https://journals.socantscot.org/index.php/psas/article/view/5209.