BOSMANS, J. L. Lewin, Het clandestiene boek 1940-1945. BMGN - Low Countries Historical Review, [S. l.], v. 100, n. 1, p. 126–128, 1985. DOI: 10.18352/bmgn-lchr.2569. Disponível em: https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-102791. Acesso em: 29 mar. 2024.