@book { DerarbeitsrechtlicheAufhebungsvertrag,
    title = "Der arbeitsrechtliche Aufhebungsvertrag",
    author = "Nicole {Burkardt}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1097330"
}