TERMORSHUIZEN, Gerard. H.C. Zentgraaff contra het echtpaar Székely-Lulofs: Wie was die man?. Acta Neerlandica, [S. l.], n. 12, p. 133–143, 2016. Disponível em: https://ojs.lib.unideb.hu/actaneer/article/view/10473.. Acesso em: 2 may. 2024.