BURNETT, John. A note on the Silver Ball of Rattray. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 128, p. 1101–1104, 1999. DOI: 10.9750/PSAS.128.1101.1104. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/10037. Acesso em: 26 apr. 2024.