Pawlak, Piotr, and Jacek Brdulak. “Infrastructure Barriers, in the Development Aspect of the Problematic Regions”. AUTOBUSY – Technika, Eksploatacja, Systemy Transportowe 19, no. 10 (October 31, 2018): 62–65. Accessed November 4, 2024. https://journals.economic-research.pl/atest/article/view/1163.