@book { AnlageundVermgensberatunginBanken,
    title = "Anlage- und Vermögensberatung in Banken",
    author = "Thomas {Hammer}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832444143",
    url = "https://m.diplom.de/document/220021"
}