SOUTHESK, Earl of. The Newton Stone. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 17, p. 21–45, 1883. DOI: 10.9750/PSAS.017.21.45. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/6047. Acesso em: 25 apr. 2024.