A fourteenth-century slate roof, excavated south of Dordrecht. Bulletin KNOB, [S. l.], v. 110, n. 3-4, p. 129–132, 2011. DOI: 10.7480/knob.110.2011.3-4.83. Disponível em: https://bulletin.knob.nl/index.php/knob/article/view/Nipius129. Acesso em: 21 apr. 2026.