The Dutch round prisons of J.F. Metzelaar (1886). A research into the origin of the round form. Bulletin KNOB, [S. l.], v. 105, n. 1-2, p. 23–36, 2006. DOI: 10.7480/knob.105.2006.1-2.190. Disponível em: https://bulletin.knob.nl/index.php/knob/article/view/Ticheloven23. Acesso em: 21 apr. 2026.