Harfst, J., & Wirth, P. (2014). The Significance of Endogenous Potentials in Regions Characterized by Small and Medium Sized Towns: Considerations Against the Background of the Territorial Agenda 2020. Raumforschung Und Raumordnung | Spatial Research and Planning, 72(6), 463–475. https://doi.org/10.1007/s13147-014-0312-9