@book { TheECommerceMythorLightintheDarkness,
    title = "The E-Commerce: Myth or Light in the Darkness",
    author = "Lars {Haberzettl}",
    year = "2000",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832423063",
    url = "https://m.diplom.de/document/218121"
}