Schiller, Georg, et al. “Resource Efficiency of Settlement Structures: Terms, Conceptual Implications and Connecting Factors to the Resilience Debate”. Raumforschung Und Raumordnung | Spatial Research and Planning, vol. 70, no. 4, Aug. 2012, pp. 377–386, https://doi.org/10.1007/s13147-012-0168-9.