@book { eDemocracy,
    title = "eDemocracy",
    subtitle = "Public Online Engagement by the European Commission",
    author = "Matthias {Ulrich}",
    year = "2005",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832486075",
    url = "https://m.diplom.de/document/223801"
}