@book { VersorgungsstrukturenimUmbruch,
    title = "Versorgungsstrukturen im Umbruch",
    author = "Rainer {Pitschas}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1108396"
}