@book { NeualsPDL,
    title = "Neu als PDL",
    author = "Jutta {König} and Michaela {Schneider}",
    year = "2021",
    publisher = "Schlütersche Verlagsgesellschaft mbH & Co. KG",
    address = ", Deutschland",
    url = "https://schluetersche.openpublishing.com/document/1037675"
}