SZULC, Witold. Professor Stefan Kowal - Sozial- und Witrschaftshistoriker und akademischer Lehrer [Professor Stefan Kowal - social and economic historian and academic teacher]. Studia Historiae Oeconomicae, [S. l.], v. 27, n. 1, p. 3–12, 2009. DOI: 10.14746/sho.2009.27.1.001. Disponível em: https://pressto.amu.edu.pl/index.php/sho/article/view/43990. Acesso em: 12 oct. 2024.