@book { UserBuyerBehaviorintheWorldWideWeb,
    title = "User Buyer Behavior in the World Wide Web",
    author = "Andera {Gadeib}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832434564",
    url = "https://m.diplom.de/document/219123"
}