MAZURCZYK, Bogumił. Śląski Sacrosong. Śląskie Studia Historyczno-Teologiczne, [S. l.], v. 1994, p. 415–424, 1995. Disponível em: https://journals.us.edu.pl/index.php/ssht/article/view/21372. Acesso em: 5 grudz. 2025.