Jakob Schwabedal, Felix, and Felix Jakob Schwabedal. 2011. “The Spatial Planning Instrument Eigenentwicklung A Methodical Comparison of the Stipulations in the Regional Development Plans in Lower Saxony (Germany)”. Raumforschung Und Raumordnung | Spatial Research and Planning 69 (1): 17–28. https://doi.org/10.1007/s13147-010-0070-2.