Gwosdz, Krzysztof, Grzegorz Micek, Agnieszka Sobala-Gwosdz, and Agnieszka Świgost. “Review of the Issue of Indicators of the Economic Condition of Cities in Poland”. Studies of the Industrial Geography Commission of the Polish Geographical Society 33, no. 2 (September 13, 2019): 59–80. Accessed January 17, 2022. https://prace-kgp.up.krakow.pl/article/view/4942.