KAŁĄŻNY, Jerzy. "Sechs Polen-Lieder" von Joseph von Opeln-Bronikowski. Edition und Kommentar. Studia Germanica Posnaniensia, [S. l.], v. 24, p. 55–66, 2018. DOI: 10.14746/sgp.1999.24.06. Disponível em: https://pressto.amu.edu.pl/index.php/sgp/article/view/15526. Acesso em: 26 kwi. 2024.