@book { StadtumbauinschrumpfendenStdtenOstdeutschlands,
    title = "Stadtumbau in schrumpfenden Städten Ostdeutschlands",
    author = "Lars {Liebe}",
    year = "2002",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/220187"
}