Sinz, Manfred, and Jürgen Aring. “New Concepts for Spatial Development: An Impulse for the Modernisation of Spatial Planning?”. Raumforschung Und Raumordnung | Spatial Research and Planning, vol. 64, no. 6, Nov. 2006, pp. 451–459, https://doi.org/10.1007/BF03183111.