RODGER, Robin H. The silver ball of Rattray: a unique Scottish sporting trophy. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 122, p. 403–411, 1993. DOI: 10.9750/PSAS.122.403.411. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/9448. Acesso em: 26 apr. 2024.