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, 2017. DOI: 10.52412/mf.2017.H2.3652. Disponível em: https://mf.publia.org/mf/article/view/3652. Acesso em: 27 juni. 2026.