VERBEEK, J. De beker van Gerard van Loon . The Rijksmuseum Bulletin, [S. l.], v. 23, n. 4, p. 227–236, 1975. DOI: 10.52476/trb.21021. Disponível em: https://testplatform.openjournals.nl/the-rijksmuseum-bulletin/article/view/21021. Acesso em: 12 apr. 2026.