Thomson, Alexander. “Notice of a Group of Four Circles of Standing Stones in the South Corner of the Parish of Banchory Devenich, County of Kincardine”. Proceedings of the Society of Antiquaries of Scotland 5 (November 30, 1864): 130–135. Accessed November 22, 2024. https://journals.socantscot.org/index.php/psas/article/view/5119.