Kollatzsch, Jens, and Tobias Eisold. “Co-Ordinating Local-Authority and Private-Sector Planning: A Contribution to Regional Development at the Threshold to the 21st Century”. Raumforschung Und Raumordnung | Spatial Research and Planning, vol. 58, no. 2-3, Mar. 2000, pp. 185–200, https://doi.org/10.1007/BF03185189.