@book { BitcoinGeldohneBankenistdasmglich,
    title = "Bitcoin: Geld ohne Banken - ist das möglich?",
    author = "Dirk {Mölleken}",
    year = "2013",
    publisher = "BACHELOR + MASTER PUBLISHING",
    address = "Hamburg, Deutschland",
    url = "https://m.bachelor-master-publishing.de/document/296830"
}