Sturrock, John. “Notice of a Jet Necklace and Urn of the Food-Vessel Type, Found in a Cist at Balcalk, Tealing, and of the Opening of Hatton Cairn, Parish of Inverarity, Forfarshire”. Proceedings of the Society of Antiquaries of Scotland 14 (November 30, 1880): 260–267. Accessed April 26, 2024. https://journals.socantscot.org/index.php/psas/article/view/5923.