Lintz, Gerd. 2017. „Blatter, Joachim; Haverland, Markus (2014): Designing Case Studies: Explanatory Approaches in Small-N Research“. Raumforschung Und Raumordnung | Spatial Research and Planning 75 (2): 193–195. https://doi.org/10.1007/s13147-016-0462-z.