ROEBROECK, E. L. Interpretatie van Zonnewijzerfragmenten. Bulletin KNOB, [S. l.], v. 90, n. 3, p. 80–84, 1991. DOI: 10.7480/knob.90.1991.3.555. Disponível em: https://bulletin.knob.nl/index.php/knob/article/view/Roebroeck80. Acesso em: 8 mei. 2024.