ROO VAN ALDERWERELT, D. de. Robert Fruin en Rachel. Een misverstand. BMGN - Low Countries Historical Review, [S. l.], v. 91, n. 1, p. 106–126, 1976. DOI: 10.18352/bmgn-lchr.1916. Disponível em: https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-102081.. Acesso em: 21 nov. 2024.