The Lee Penny. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 57, p. 112–119, 1923. DOI: 10.9750/PSAS.057.112.119. Disponível em: https://soas-test.journals.ed.ac.uk/index.php/psas/article/view/7573. Acesso em: 27 oct. 2025.