WOŹNY, Maciej. Political activity of Bolek V Opolski in the period of Hussite wars. Wieki Stare i Nowe, [S. l.], v. 3, n. 8, p. 89–103, 2011. DOI: 10.31261/WSN.2011.11.05. Disponível em: https://journals.us.edu.pl/index.php/WSN/article/view/20392. Acesso em: 15 nov. 2026.