HEIJBROEK, J. F. François Gérard Waller (1867-1934), kunsthistoricus en collectioneur. The Rijksmuseum Bulletin, [S. l.], v. 32, n. 3, p. 118–135, 1984. DOI: 10.52476/trb.20808. Disponível em: https://bulletin.rijksmuseum.nl/article/view/20808.. Acesso em: 26 dec. 2024.