Notes on the Ancient Fortifications in the Black Isle, Ross-shire. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 17, p. 414–423, 1883. DOI: 10.9750/PSAS.017.414.423. Disponível em: https://soas-test.journals.ed.ac.uk/index.php/psas/article/view/6075. Acesso em: 27 oct. 2025.