Note of the Occurrence of Cup-Marked Stones in St Palladius’s Chapel, Fordoun. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 17, p. 423–426, 1883. DOI: 10.9750/PSAS.017.423.426. Disponível em: https://soas-test.journals.ed.ac.uk/index.php/psas/article/view/6076. Acesso em: 27 oct. 2025.