Jervise, Andrew. “Notices Descriptive of the Localities of Certain Sculptured Stone Monuments in Forfarshire, viz., - Benvie, and Invergowrie; Strathmartin, and Balutheran; Monifieth; Cross of Camus, and Arbirlot. Part III”. Proceedings of the Society of Antiquaries of Scotland 2 (November 30, 1859): 442–452. Accessed June 16, 2024. https://journals.socantscot.org/index.php/psas/article/view/4456.