@book { ElectronicCommerce,
    title = "Electronic Commerce",
    subtitle = "Anwendungsmöglichkeiten und Potentiale des elektronischen Geschäftsverkehrs",
    author = "Simone {Schmid}",
    year = "1999",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832417741",
    url = "https://m.diplom.de/document/217635"
}