STEPHAN, Rudolf. Zu Beethovens letzten Quartetten . Die Musikforschung, [S. l.], v. 23, n. 3, p. 245–256, 1970. DOI: 10.52412/mf.1970.H3.2126. Disponível em: https://mf.journals.qucosa.de/mf/article/view/2126. Acesso em: 15 juni. 2025.