M. Gumbert-Hepp, J.P. Gumbert, Willem Procurator. Kroniek. Editie en vertaling van het Chronicon van Wilhelmus Procurator, Gumbert-Hepp, M., met medewerking van Gumbert, J. P. ed. BMGN - Low Countries Historical Review, [S. l.], v. 119, n. 1, p. 88–90, 2004. DOI: 10.18352/bmgn-lchr.5979. Disponível em: https://ojstest.minions.amsterdam/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-106859.. Acesso em: 15 nov. 2024.