REED, Nicholas. The Scottish campaigns of Septimus Severus. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 107, p. 92–102, 1978. DOI: 10.9750/PSAS.107.92.102. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/8933. Acesso em: 23 apr. 2024.