@book { Finanzwissenschaft,
    title = "Finanzwissenschaft",
    author = "Horst {Zimmermann} and Klaus-Dirk {Henke} and Michael {Broer}",
    year = "2021",
    publisher = "Vahlen",
    address = "München, Deutschland",
    url = "https://vahlen.openpublishing.com/document/1221380"
}