FLAMM, Christoph. Rutger Helmers : Not Russian Enough? Nationalism and Cosmopolitanism in Nineteenth-Century Russian Opera. Die Musikforschung, [S. l.], v. 70, n. 2, p. 182–185, 2024. DOI: 10.52412/mf.2017.H2.3652. Disponível em: https://mf.journals.qucosa.de/mf/article/view/3652. Acesso em: 18 jan. 2025.