Blom, J.C.H. “Grijs Verleden?”. BMGN - Low Countries Historical Review 116, no. 4 (January 1, 2001): 483–489. Accessed April 23, 2024. https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-106378.