@book { UbiquitousComputingandtheImpactonInformationEconomy,
    title = "Ubiquitous Computing and the Impact on Information Economy",
    author = "Markus {Riegler}",
    year = "2003",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832474577",
    url = "https://m.diplom.de/document/222738"
}