HAY, George. The late medieval development of the High Kirk of St Giles, Edinburgh. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 107, p. 242–260, 1978. DOI: 10.9750/PSAS.107.242.260. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/8939. Acesso em: 2 may. 2024.