@book { StadtRottenburgamNeckarEineStadtimWandel,
    title = "Stadt Rottenburg am Neckar. Eine Stadt im Wandel?",
    author = "Peter {Rienhardt}",
    year = "1998",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/216524"
}