@book { Informationsmanagement20,
    title = "Informationsmanagement 2.0",
    author = "Andreas {Giese}",
    year = "2009",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836624947",
    url = "https://m.diplom.de/document/226482"
}