@book { IntelligenteAgentenimeCommerce,
    title = "Intelligente Agenten im eCommerce",
    author = "Daniel {Teufer}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832445034",
    url = "https://m.diplom.de/document/220104"
}