SYKES, Jonathan J F. The origin of the Portuguese Drummonds: a Scotsman in late medieval Madeira?. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 152, p. 241–259, 2023. DOI: 10.9750/PSAS.152.1377. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/10702. Acesso em: 20 may. 2024.