BOSSCHER, D.F.J. L. Casteleijn, Tekens in de tijd. 65 jaar Joop den Uyl. BMGN - Low Countries Historical Review, [S. l.], v. 102, n. 1, p. 108–110, 1987. DOI: 10.18352/bmgn-lchr.2810. Disponível em: https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-103078.. Acesso em: 22 dec. 2024.