Orczyk, Małgorzata, and Franciszek Tomaszewski. “Freight Tram Concept for the City of Poznań”. Transport Economics and Logistics 80 (December 31, 2018): 169–178. Accessed May 2, 2024. https://czasopisma.bg.ug.edu.pl/index.php/znetil/article/view/2865.