Fawcett, Richard. “The Blackadder Aisle at Glasgow Cathedral: A Reconsideration of the Architectural Evidence for Its Date”. Proceedings of the Society of Antiquaries of Scotland 115 (November 30, 1987): 277–287. Accessed November 24, 2024. https://journals.socantscot.org/index.php/psas/article/view/9187.