@book { LeereLokale,
    title = "Leere Lokale",
    author = "Ursula {Obernosterer}",
    year = "2004",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832478773",
    url = "https://m.diplom.de/document/223130"
}