Kossmann, E.H. “Romeins Breukvlak En De Nederlandse Geschiedenis”. BMGN - Low Countries Historical Review 106, no. 4 (January 1, 1991): 652–658. Accessed April 23, 2024. https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-103922.