Mahnken, Gerhard. “Between Stubbornness and External Image: Intra-Regional Marketing in the Metropolitan Region of Brandenburg Berlin”. Raumforschung und Raumordnung | Spatial Research and Planning 61, no. 4 (July 31, 2003): 268–277. Accessed August 15, 2026. https://rur.oekom.de/index.php/rur/article/view/1589.