@book { KostenkalkulationfrLeistungenimKrankenhaus,
    title = "Kostenkalkulation für Leistungen im Krankenhaus",
    author = "Josef Sebastian {Oswald}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1095513"
}