PIETRUSZEK-KWARCIAK, Bożena. The prospect of regional development on the example of the Silesian voivodeship. Studia Politicae Universitatis Silesiensis, [S. l.], v. 17, 2018. Disponível em: https://trrest.vot.pl/ojsus/index.php/SPUS/article/view/5714. Acesso em: 5 lip. 2025.