Heywood 2017,第69頁. sfn error: no target: CITEREFHeywood2017 (help) Hall, Peter A.; Lamont, Michèle. Social Resilience in the Neoliberal Era. Cambridge University
Severus:Legionary Denarius". Penelope.uchicago.edu. Retrieved 2019-05-10 Brown, Peter Robert Lamont (1971). The World of Late Antiquity. London: Thames and Hudson. Potter