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://bulletin.rijksmuseum.nl/article/view/21021.. Acesso em: 17 dec. 2024.