@book { WeltenderAngst,
    title = "Welten der Angst",
    author = "Veit {Etzold}",
    year = "2002",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832460303",
    url = "https://m.diplom.de/document/221458"
}