@book { DiepersonenbedingteKndigungwegenKrankheit,
    title = "Die personenbedingte Kündigung wegen Krankheit",
    author = "Renate {Knauf}",
    year = "2007",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836606172",
    url = "https://m.diplom.de/document/225415"
}