@book { BewertungvonWhrungsoptionen,
    title = "Bewertung von Währungsoptionen",
    author = "Volker {Piepelow}",
    year = "2002",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832461393",
    url = "https://m.diplom.de/document/221599"
}