THOMAS, F W L. Analysis of the Ptolemaic Geography of Scotland. With two Maps. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 11, p. 198–225, 1875. DOI: 10.9750/PSAS.011.198.225. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/5742. Acesso em: 3 may. 2024.