Boogman, J.C. “The Union of Utrecht. Its Genesis and Consequences”. BMGN - Low Countries Historical Review 94, no. 3 (January 1, 1979): 377–407. Accessed October 9, 2024. https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-102290.