Ross, Thomas. “Notes on Sculptured Stones With Chariots, in the Neighbourhood of Auchterarder, and in Perth Museum, and of a Sculptured Monument Recently Found Near Camelon, and Now in the National Museum”. Proceedings of the Society of Antiquaries of Scotland 36 (November 30, 1902): 597–610. Accessed November 3, 2024. https://journals.socantscot.org/index.php/psas/article/view/6842.