Schmitz, Julian, Stefan Fina, and Christian Gerten. “How Walkable Are German Cities? New Results from the Field of Walkability Research”. Raumforschung und Raumordnung | Spatial Research and Planning 81, no. 4 (August 31, 2023): 327–341. Accessed May 1, 2024. https://rur.oekom.de/index.php/rur/article/view/1664.