CRAWFORD, Barbara E. Ronald Gordon Gant. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 130, p. 1–5, 2002. DOI: 10.9750/PSAS.130.1.5. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/9513. Acesso em: 29 may. 2024.