VREELING, S. Eise Eisinga was hier: De afnemende authenticiteit van het Planetarium in Franeker rond 1900. Bulletin KNOB, [S. l.], v. 121, n. 2, p. 20–33, 2022. DOI: 10.48003/knob.121.2022.2.745. Disponível em: https://bulletin.knob.nl/index.php/knob/article/view/745. Acesso em: 1 jul. 2022.