[1]
Knapp, W. and Volgmann, K. 2011. New Economic Poles in the City Regions of North Rhine-Westphalia: Postsuburbanisation and Restructuring of the City. Raumforschung und Raumordnung | Spatial Research and Planning. 69, 5 (Oct. 2011), 303–317. DOI:https://doi.org/10.1007/s13147-011-0112-4.