Milis, L. “D.E.H. De Boer, J.W. Marsilje, De Nederlanden in De Late Middeleeuwen”. BMGN - Low Countries Historical Review 104, no. 3 (January 1, 1989): 433–434. Accessed April 16, 2024. https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-103521.