@book { SchrumpfendeStdteinDeutschland, title = "Schrumpfende Städte in Deutschland", author = "Jasmin {Müller-Braig}", year = "2011", publisher = "GRIN Verlag", address = "München, Germany", doi = "10.3239/9783656015710", url = "https://www.hausarbeiten.de/document/179208" }