Soczówka, Andrzej, and Piotr Chyliński. “Changes in the Polish Market of Manufacturing Electric and Diesel Multiple Units After 1989”. Studies of the Industrial Geography Commission of the Polish Geographical Society 37, no. 1 (March 31, 2023): 132–157. Accessed April 26, 2024. https://prace-kgp.uken.krakow.pl/article/view/9646.