KRUL, W. I. Schöffer, Veelvormig verleden. Zeventien studies in de vaderlandse geschiedenis. BMGN - Low Countries Historical Review, [S. l.], v. 105, n. 3, p. 407–408, 1990. DOI: 10.18352/bmgn-lchr.3245. Disponível em: https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-103692. Acesso em: 4 may. 2024.