@book { AnlagestrategienfrprivateAnleger,
    title = "Anlagestrategien für private Anleger",
    author = "Günter {Weisser}",
    year = "1998",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832411374",
    url = "https://m.diplom.de/document/217026"
}