Martin Oriol, Jordi, and Eduard Cabrera Delgado. “The Digitization of the Tramway Infrastructure of the Barcelona Metropolitan Area”. GeoFocus. International Review of Geographical Information Science and Technology, no. 31 (July 24, 2023): 87–100. Accessed March 13, 2025. https://geofocus.org/index.php/geofocus/article/view/818.