SMALL, John. Sketches of Early Scottish Alchemists: Michael Scot - King James IV. - Sir George Erskine of Innertiel. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 11, p. 179–197, 1875. DOI: 10.9750/PSAS.011.179.197. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/5740. Acesso em: 22 jul. 2024.