The Van Houten Monuments. A Reconstruction of the methods of Eelke van Houten (1872-1970) Walther Schoonenberg. Bulletin KNOB, [S. l.], v. 111, n. 4, p. 221–231, 2012. DOI: 10.7480/knob.111.2012.4.356. Disponível em: https://bulletin.knob.nl/index.php/knob/article/view/Schoonenberg221. Acesso em: 21 apr. 2026.