Robinson, Charles H. (1917). The Conversion of Europe. London, England: Longmans, Green, and Co.
doi.org
Wijnendaele, Jeroen W.P. (2016). "'Warlordism'and the Disintegration of the Western Roman Army". In Armstrong, Jeremy (ed.). Circum Mare: Themes in Ancient Warfare. Boston: Brill. pp. 185–203. doi:10.1163/9789004284852_011. ISBN978-9-00428-485-2.
natlib.govt.nz
paperspast.natlib.govt.nz
Le Mesant de Chesnais, Theophilus (November 1882). "The Anlgo-Saxon and Celtic Schools". New Zealand Tablet. Dunedin, New Zealand. Retrieved April 18, 2024.