@book { MobileCommerceBusinesstoConsumerBereich,
    title = "Mobile Commerce Business-to-Consumer-Bereich",
    author = "Markus {Schneider}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832441210",
    url = "https://m.diplom.de/document/219745"
}