DE BRUYN KOPS, C. J. Vergeten zelfportretten van Govert Flinck en Bartholomeus van der Helst . The Rijksmuseum Bulletin, [S. l.], v. 13, n. 1, p. 20–29, 1965. DOI: 10.52476/trb.21222. Disponível em: https://testplatform.openjournals.nl/the-rijksmuseum-bulletin/article/view/21222. Acesso em: 12 apr. 2026.