F. van der Elst, De bewogen jaren: mijn memoires 1920-1958. BMGN - Low Countries Historical Review, [S. l.], v. 103, n. 1, p. 86–87, 1988. DOI: 10.18352/bmgn-lchr.2916. Disponível em: https://ojstest.minions.amsterdam/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-103271.. Acesso em: 2 jul. 2024.