Lucassen, L. “I. Boogaarts, J. Burgers, De Verborgen Stad. De Zeven Gezichten Van Rotterdam”. BMGN - Low Countries Historical Review 117, no. 1 (January 1, 2002): 139–141. Accessed April 13, 2024. https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-106485.