@book { Rckwrtssprechen,
    title = "Rückwärtssprechen",
    author = "Andrea {Jungclaus}",
    year = "2002",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832461409",
    url = "https://m.diplom.de/document/221600"
}