J. van den Broek, J. Julsing, Het geheime dagboek van de Groninger stadssecretaris Johan Julsing 1589-1594. BMGN - Low Countries Historical Review, [S. l.], v. 122, n. 4, 2007. DOI: 10.18352/bmgn-lchr.6699. Disponível em: https://ojstest.minions.amsterdam/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-107668.. Acesso em: 25 dec. 2024.