@book { DieKndigungwegenhufigerKurzerkrankungen,
    title = "Die Kündigung wegen häufiger Kurzerkrankungen",
    author = "Petra {Hamann}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1107128"
}