Two unpublished groats of James I. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 71, p. 90–91, 1937. DOI: 10.9750/PSAS.071.90.91. Disponível em: https://soas-test.journals.ed.ac.uk/index.php/psas/article/view/8039. Acesso em: 27 oct. 2025.