@book { EGovernmentinderStadtBrandenburgadHavel,
    title = "E-Government in der Stadt Brandenburg a.d. Havel",
    author = "Christian {Förster}",
    year = "2002",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832459420",
    url = "https://m.diplom.de/document/221392"
}