Blockmans, W.P. “R. Doehaerd, Oeconomica Mediaevalia”. BMGN - Low Countries Historical Review 102, no. 1 (January 1, 1987): 57–58. Accessed December 22, 2024. https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-103043.