Sala, Krzysztof. “Changes in the Structure of Industry in Poland in the Years 1990-2014 – Conditions and Trends”. Studies of the Industrial Geography Commission of the Polish Geographical Society 30, no. 3 (January 17, 2017): 114–126. Accessed May 2, 2024. https://prace-kgp.uken.krakow.pl/article/view/3295.