@book { DiekollektiveVorsorgefrdenPflegefallimAlter,
    title = "Die kollektive Vorsorge für den Pflegefall im Alter",
    author = "Stephan {Winters}",
    year = "2018",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b13747",
    url = "https://www.peterlang.com/document/1068328"
}