@book { DieEntwicklungundAkzeptanzvonEPayment,
    title = "Die Entwicklung und Akzeptanz von E-Payment",
    author = "Patrick Francisco {Starzer}",
    year = "2010",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836649513",
    url = "https://m.diplom.de/document/227905"
}