@book { DieAblsungvonNotenbankgelddurchCybermoney,
    title = "Die Ablösung von Notenbankgeld durch Cybermoney",
    author = "Marco {Klumpers}",
    year = "2000",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832422790",
    url = "https://m.diplom.de/document/218096"
}