FREITAG, Aleksander. Financialization of the hard coal industry in Poland. Zeszyty Studenckie „Nasze Studia", [S. l.], n. 12, p. 51–60, 2022. Disponível em: https://czasopisma.bg.ug.edu.pl/index.php/naszestudia/article/view/7032. Acesso em: 22 jul. 2024.