Kilpatrick, Kelly A. “The Iconography of the Papil Stone: Sculptural and Literary Comparisons With a Pictish Motif”. Proceedings of the Society of Antiquaries of Scotland 141 (November 30, 2012): 159–205. Accessed April 23, 2024. https://journals.socantscot.org/index.php/psas/article/view/9774.