The Sint-Servaas church in Maastricht (II). Bulletin KNOB, [S. l.], v. 91, n. 5-6, p. 170–176, 1992. DOI: 10.7480/knob.91.1992.5-6.489. Disponível em: https://bulletin.knob.nl/index.php/knob/article/view/Bosman170. Acesso em: 21 apr. 2026.