Kossmann-Putto, J.A. “B.R. De Melker, Oorkondenboek Van Amsterdam Tot 1400. Supplement”. BMGN - Low Countries Historical Review 112, no. 2 (January 1, 1997): 258–258. Accessed December 21, 2024. https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-105150.