Tracy, J.D. “F. Postma, Viglius Van Aytta. De Jaren Met Granvelle 1549-1564”. BMGN - Low Countries Historical Review 116, no. 3 (January 1, 2001): 380–382. Accessed May 3, 2024. https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-106342.