@book { BesteuerungdesElectronicCommerce,
    title = "Besteuerung des Electronic Commerce",
    author = "Tobias {Herbst}",
    year = "1999",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832414931",
    url = "https://m.diplom.de/document/217341"
}