MURRRAY, Diana; RALSTON, Ian. Professor Roger James Mercer. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 148, p. 1–12, 2019. DOI: 10.9750/PSAS.148.0003. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/10267. Acesso em: 1 may. 2024.