Cools, M. ., H. . Gnest, and D. . Fürst. “Parametric Governance — a New Steering Mode for Spatial Planning?”. Raumforschung Und Raumordnung | Spatial Research and Planning, vol. 60, no. 3-4, May 2002, pp. 219–231, doi:10.1007/BF03183055.