@book { FreizeitohneMue,
    title = "Freizeit ohne Muße",
    subtitle = "Zum Verlust der Kontemplation in unserer Zeit",
    author = "Peggy {Döbbecke}",
    year = "2000",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/218011"
}