Termorshuizen, Gerard. “H.C. Zentgraaff Contra Het Echtpaar Székely-Lulofs: Wie Was Die Man?”. Acta Neerlandica, no. 12 (September 1, 2016): 133–143. Accessed July 18, 2024. https://ojs.lib.unideb.hu/actaneer/article/view/10473.