VAN GELDER, H. E. In Memoriam Dr. F. Schmidt-Degener . The Rijksmuseum Bulletin, [S. l.], v. 1, n. 3-4, p. 45–49, 1953. DOI: 10.52476/trb.21557. Disponível em: https://bulletin.rijksmuseum.nl/article/view/21557.. Acesso em: 5 feb. 2025.