CAPPON, C. G. Verhoeven, J.A. Mol, H. Bremer, Friese testamenten tot 1550. BMGN - Low Countries Historical Review, [S. l.], v. 111, n. 2, p. 229–230, 1996. DOI: 10.18352/bmgn-lchr.4234. Disponível em: https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-104868. Acesso em: 24 apr. 2024.