ROËLL, D. C. Ter inleiding . The Rijksmuseum Bulletin, [S. l.], v. 1, n. 1-2, p. 1, 1953. DOI: 10.52476/trb.21545. Disponível em: https://bulletin.rijksmuseum.nl/article/view/21545.. Acesso em: 17 aug. 2025.