TKOCZ, M.; HEDER, A. Innovative activities in a failing industrial trade based on the example of the coal mining industry. Studies of the Industrial Geography Commission of the Polish Geographical Society, [S. l.], v. 20, p. 134–146, 2012. DOI: 10.24917/20801653.20.9. Disponível em: https://prace-kgp.uken.krakow.pl/article/view/394. Acesso em: 3 may. 2024.