MEGAW, J V S. Emeritus Professor Derek Douglas Alexander Simpson. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 134, p. 3–6, 2005. DOI: 10.9750/PSAS.134.3.6. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/9622. Acesso em: 26 apr. 2024.