@book { EntwicklungstendenzenimInternetCommerce,
    title = "Entwicklungstendenzen im Internet-Commerce",
    author = "Berthold {Glass}",
    year = "2000",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832422325",
    url = "https://m.diplom.de/document/218053"
}