BAJOREK, Angela; WALERJAŃSKI, Dariusz. Od Eckerta do Janoscha. Historia kosmopolity z Zabrza. Wieki Stare i Nowe, [S. l.], v. 6, n. 11, p. 140–150, 2014. DOI: 10.31261/WSN.2014.14.01.10. Disponível em: https://journals.us.edu.pl/index.php/WSN/article/view/22300. Acesso em: 5 grudz. 2025.