GÜLKE, Peter. Herbert Haffner: Furtwängler. . Die Musikforschung, [S. l.], v. 57, n. 2, p. 200–201, 2004. DOI: 10.52412/mf.2004.H2.4550. Disponível em: https://mf.journals.qucosa.de/mf/article/view/4550. Acesso em: 19 apr. 2025.