@book { DerVersorgungsauftragdesPlankrankenhauses,
    title = "Der Versorgungsauftrag des Plankrankenhauses",
    author = "fRIEDRICH {Kies}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1087333"
}